Grok 4.3

x-ai/grok-4.3-20260430

xAI: Grok 4.3 is a model released by x‑ai on 2026‑04‑17. It accepts text, image, and file inputs, produces text output, and supports a context window of up to 1,000,000 tokens. The model includes tool and reasoning support, is not released with open weights, and is priced at $1.25 per M input tokens and $2.50 per M output tokens.

  • tool use
  • structured outputs
  • reasoning

At a glance

providerx-ai
releasedApr 17, 2026
context1M
input / M$1.25

Specifications

What the API gives you

Context window
1M tokens
Max output
900K tokens
Input price
$1.25 / 1M tokens
Output price
$2.50 / 1M tokens
Cache read
$0.20 / 1M tokens
Modalities
text, image, file → text
Knowledge cutoff
Released
Apr 17, 2026

Measured evidence

Public benchmark record

Design Arena Coding
1218 Elo2026-07-28
Design Arena Coding
1218 Elo2026-07-27
Design Arena Coding
1217 Elo2026-07-30
Design Arena Coding
1218 Elo2026-07-29
Design Arena Coding
1217 Elo2026-07-31
Design Arena Coding
1216 Elo2026-08-02
Design Arena Coding
1215 Elo2026-08-05
Design Arena Coding
1216 Elo2026-08-01
Design Arena Coding
1214 Elo2026-08-09
Design Arena Coding
1216 Elo2026-08-03
Design Arena Coding
1215 Elo2026-08-04
Design Arena Coding
1211 Elo2026-08-14
Design Arena Coding
1215 Elo2026-08-06
Design Arena Coding
1214 Elo2026-08-10
Design Arena Coding
1215 Elo2026-08-07
Design Arena Coding
1205 Elo2026-08-18
Design Arena Coding
1214 Elo2026-08-08
Design Arena Coding
1206 Elo2026-08-15
Design Arena Coding
1214 Elo2026-08-11
Design Arena Coding
1213 Elo2026-08-12
Design Arena Coding
1212 Elo2026-08-13
Design Arena Coding
1204 Elo2026-08-19
Design Arena Coding
1210 Elo2026-08-27
Design Arena Coding
1211 Elo2026-08-21
Design Arena Coding
1204 Elo2026-08-20
Design Arena Coding
1206 Elo2026-08-16
Design Arena Coding
1202 Elo2026-09-05
Design Arena Coding
1206 Elo2026-08-17
Design Arena Coding
1211 Elo2026-08-22
Design Arena Coding
1211 Elo2026-08-23
Design Arena Coding
1210 Elo2026-08-28
Design Arena Coding
1211 Elo2026-08-24
Design Arena Coding
1211 Elo2026-08-25
Design Arena Coding
1211 Elo2026-08-26
Design Arena Coding
1202 Elo2026-09-06
Design Arena Coding
1210 Elo2026-08-29
Design Arena Coding
1209 Elo2026-08-30
Design Arena Coding
1210 Elo2026-08-31
Design Arena Coding
1210 Elo2026-09-01
Design Arena Coding
1208 Elo2026-09-02
Design Arena Coding
1206 Elo2026-09-03
Design Arena Coding
1205 Elo2026-09-04
Design Arena UI
1230 Elo2026-07-28
Design Arena UI
1230 Elo2026-07-27
Design Arena UI
1228 Elo2026-07-30
Design Arena UI
1229 Elo2026-07-29
Design Arena UI
1227 Elo2026-07-31
Design Arena UI
1228 Elo2026-08-02
Design Arena UI
1228 Elo2026-08-01
Design Arena UI
1227 Elo2026-08-05
Design Arena UI
1225 Elo2026-08-09
Design Arena UI
1228 Elo2026-08-03
Design Arena UI
1227 Elo2026-08-04
Design Arena UI
1223 Elo2026-08-14
Design Arena UI
1227 Elo2026-08-06
Design Arena UI
1227 Elo2026-08-07
Design Arena UI
1225 Elo2026-08-10
Design Arena UI
1225 Elo2026-08-08
Design Arena UI
1221 Elo2026-08-18
Design Arena UI
1226 Elo2026-08-11
Design Arena UI
1222 Elo2026-08-15
Design Arena UI
1226 Elo2026-08-12
Design Arena UI
1226 Elo2026-08-13
Design Arena UI
1221 Elo2026-08-19
Design Arena UI
1222 Elo2026-08-16
Design Arena UI
1221 Elo2026-08-20
Design Arena UI
1218 Elo2026-08-27
Design Arena UI
1221 Elo2026-08-17
Design Arena UI
1214 Elo2026-09-05
Design Arena UI
1219 Elo2026-08-21
Design Arena UI
1219 Elo2026-08-22
Design Arena UI
1220 Elo2026-08-23
Design Arena UI
1220 Elo2026-08-24
Design Arena UI
1218 Elo2026-08-28
Design Arena UI
1220 Elo2026-08-25
Design Arena UI
1220 Elo2026-08-26
Design Arena UI
1215 Elo2026-09-06
Design Arena UI
1218 Elo2026-08-29
Design Arena UI
1218 Elo2026-08-30
Design Arena UI
1218 Elo2026-08-31
Design Arena UI
1218 Elo2026-09-01
Design Arena UI
1217 Elo2026-09-02
Design Arena UI
1215 Elo2026-09-03
Design Arena UI
1214 Elo2026-09-04
Design Arena Web-app Agent
1175 Elo2026-07-28
Design Arena Web-app Agent
1175 Elo2026-07-27
Design Arena Web-app Agent
1174 Elo2026-07-30
Design Arena Web-app Agent
1174 Elo2026-07-29
Design Arena Web-app Agent
1174 Elo2026-07-31
Design Arena Web-app Agent
1173 Elo2026-08-02
Design Arena Web-app Agent
1174 Elo2026-08-01
Design Arena Web-app Agent
1177 Elo2026-08-05
Design Arena Web-app Agent
1171 Elo2026-08-09
Design Arena Web-app Agent
1173 Elo2026-08-03
Design Arena Web-app Agent
1173 Elo2026-08-04
Design Arena Web-app Agent
1165 Elo2026-08-14
Design Arena Web-app Agent
1177 Elo2026-08-06
Design Arena Web-app Agent
1168 Elo2026-08-10
Design Arena Web-app Agent
1177 Elo2026-08-07
Design Arena Web-app Agent
1168 Elo2026-08-18
Design Arena Web-app Agent
1178 Elo2026-08-08
Design Arena Web-app Agent
1167 Elo2026-08-11
Design Arena Web-app Agent
1170 Elo2026-08-15
Design Arena Web-app Agent
1167 Elo2026-08-12
Design Arena Web-app Agent
1167 Elo2026-08-13
Design Arena Web-app Agent
1167 Elo2026-08-19
Design Arena Web-app Agent
1160 Elo2026-08-27
Design Arena Web-app Agent
1167 Elo2026-08-20
Design Arena Web-app Agent
1171 Elo2026-08-16
Design Arena Web-app Agent
1159 Elo2026-09-05
Design Arena Web-app Agent
1171 Elo2026-08-17
Design Arena Web-app Agent
1166 Elo2026-08-21
Design Arena Web-app Agent
1166 Elo2026-08-22
Design Arena Web-app Agent
1166 Elo2026-08-23
Design Arena Web-app Agent
1161 Elo2026-08-28
Design Arena Web-app Agent
1161 Elo2026-08-24
Design Arena Web-app Agent
1162 Elo2026-08-25
Design Arena Web-app Agent
1162 Elo2026-08-26
Design Arena Web-app Agent
1160 Elo2026-09-06
Design Arena Web-app Agent
1161 Elo2026-08-29
Design Arena Web-app Agent
1160 Elo2026-08-30
Design Arena Web-app Agent
1160 Elo2026-08-31
Design Arena Web-app Agent
1160 Elo2026-09-01
Design Arena Web-app Agent
1159 Elo2026-09-02
Design Arena Web-app Agent
1159 Elo2026-09-03
Design Arena Web-app Agent
1159 Elo2026-09-04
Design Arena Website
1219 Elo2026-07-28
Design Arena Website
1217 Elo2026-07-30
Design Arena Website
1219 Elo2026-07-27
Design Arena Website
1217 Elo2026-07-29
Design Arena Website
1216 Elo2026-07-31
Design Arena Website
1215 Elo2026-08-02
Design Arena Website
1215 Elo2026-08-01
Design Arena Website
1215 Elo2026-08-05
Design Arena Website
1215 Elo2026-08-03
Design Arena Website
1214 Elo2026-08-09
Design Arena Website
1215 Elo2026-08-04
Design Arena Website
1212 Elo2026-08-14
Design Arena Website
1215 Elo2026-08-06
Design Arena Website
1215 Elo2026-08-07
Design Arena Website
1214 Elo2026-08-10
Design Arena Website
1214 Elo2026-08-08
Design Arena Website
1204 Elo2026-08-18
Design Arena Website
1214 Elo2026-08-11
Design Arena Website
1204 Elo2026-08-15
Design Arena Website
1213 Elo2026-08-12
Design Arena Website
1212 Elo2026-08-13
Design Arena Website
1204 Elo2026-08-19
Design Arena Website
1204 Elo2026-08-16
Design Arena Website
1204 Elo2026-08-20
Design Arena Website
1212 Elo2026-08-27
Design Arena Website
1204 Elo2026-08-17
Design Arena Website
1208 Elo2026-09-05
Design Arena Website
1212 Elo2026-08-21
Design Arena Website
1212 Elo2026-08-22
Design Arena Website
1213 Elo2026-08-23
Design Arena Website
1213 Elo2026-08-24
Design Arena Website
1212 Elo2026-08-28
Design Arena Website
1213 Elo2026-08-25
Design Arena Website
1213 Elo2026-08-26
Design Arena Website
1206 Elo2026-09-06
Design Arena Website
1211 Elo2026-08-29
Design Arena Website
1212 Elo2026-08-30
Design Arena Website
1212 Elo2026-08-31
Design Arena Website
1213 Elo2026-09-01
Design Arena Website
1211 Elo2026-09-02
Design Arena Website
1209 Elo2026-09-03
Design Arena Website
1208 Elo2026-09-04
LiveBench Coding
69.9%2026-06-25
LiveBench Language
73.6%2026-06-25
LiveBench Math
84.3%2026-06-25
LiveBench Reasoning
70.8%2026-06-25
LMArena Agent
-8.32026-07-13
LMArena Agent
-7.82026-07-20
LMArena Agent
-7.92026-07-27
LMArena Agent
-8.22026-07-21
LMArena Agent
-82026-07-28
LMArena Agent
-8.12026-08-03
LMArena Agent
-8.42026-08-12
LMArena Agent
-8.52026-08-13
LMArena Agent
-8.32026-08-06
LMArena Agent
-8.52026-08-11
LMArena Agent
-9.92026-08-24
LMArena Agent
-10.82026-08-31
LMArena Agent
-11.62026-09-05
LMArena Agent
-10.22026-08-27
LMArena Creative Writing
1387 Elo2026-07-21
LMArena Creative Writing
1388 Elo2026-07-27
LMArena Creative Writing
1388 Elo2026-07-30
LMArena Creative Writing
1387 Elo2026-08-02
LMArena Creative Writing
1387 Elo2026-08-03
LMArena Creative Writing
1387 Elo2026-08-06
LMArena Creative Writing
1386 Elo2026-08-12
LMArena Creative Writing
1386 Elo2026-08-21
LMArena Creative Writing
1384 Elo2026-09-02
LMArena Creative Writing
1384 Elo2026-08-27
LMArena Creative Writing
1384 Elo2026-09-01
LMArena Long Query
1398 Elo2026-07-21
LMArena Long Query
1398 Elo2026-07-27
LMArena Long Query
1398 Elo2026-07-30
LMArena Long Query
1398 Elo2026-08-02
LMArena Long Query
1397 Elo2026-08-06
LMArena Long Query
1398 Elo2026-08-03
LMArena Long Query
1396 Elo2026-08-12
LMArena Long Query
1396 Elo2026-08-21
LMArena Long Query
1395 Elo2026-09-02
LMArena Long Query
1395 Elo2026-08-27
LMArena Long Query
1395 Elo2026-09-01
LMArena Math
1390 Elo2026-07-21
LMArena Math
1391 Elo2026-07-27
LMArena Math
1391 Elo2026-07-30
LMArena Math
1389 Elo2026-08-02
LMArena Math
1389 Elo2026-08-03
LMArena Math
1389 Elo2026-08-06
LMArena Math
1388 Elo2026-08-12
LMArena Math
1389 Elo2026-08-21
LMArena Math
1389 Elo2026-09-01
LMArena Math
1389 Elo2026-08-27
LMArena Text
1442 Elo2026-07-21
LMArena Text
1442 Elo2026-08-02
LMArena Text
1443 Elo2026-07-27
LMArena Text
1443 Elo2026-07-30
LMArena Text
1442 Elo2026-08-10
LMArena Text
1442 Elo2026-08-03
LMArena Text
1442 Elo2026-08-06
LMArena Text
1442 Elo2026-08-21
LMArena Text
1441 Elo2026-08-12
LMArena Text
1443 Elo2026-09-01
LMArena Text
1442 Elo2026-08-27
LMArena Text
1443 Elo2026-09-02
LMArena Vision
1235 Elo2026-07-12
LMArena Vision
1246 Elo2026-07-21
LMArena Vision
1245 Elo2026-07-26
LMArena Vision
1245 Elo2026-07-30
LMArena Vision
1244 Elo2026-08-02
LMArena Vision
1244 Elo2026-08-06
LMArena Vision
1241 Elo2026-08-21
LMArena Vision
1241 Elo2026-08-27
LMArena WebDev
1360 Elo2026-07-16
LMArena WebDev
1360 Elo2026-07-21
LMArena WebDev
1361 Elo2026-07-20
LMArena WebDev
1358 Elo2026-07-27
LMArena WebDev
1359 Elo2026-07-24
LMArena WebDev
1358 Elo2026-07-28
LMArena WebDev
1358 Elo2026-07-30
LMArena WebDev
1357 Elo2026-08-01
LMArena WebDev
1357 Elo2026-07-31
LMArena WebDev
1357 Elo2026-08-06
LMArena WebDev
1357 Elo2026-08-02
LMArena WebDev
1355 Elo2026-08-12
LMArena WebDev
1355 Elo2026-08-10
LMArena WebDev
1354 Elo2026-08-14
LMArena WebDev
1356 Elo2026-09-01
LMArena WebDev
1356 Elo2026-09-05
LMArena WebDev
1357 Elo2026-08-21
LMArena WebDev
1356 Elo2026-08-30

LMArena data licensed CC-BY-4.0. Aider (Apache-2.0) and SWE-bench (MIT) are open. Design Arena uses blind human preference.

Task evidence

How broad is the support?

Each status is exact to this model version and the selected task. Official release claims remain provisional.

  • Best LLM for Competition MathEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Business WritingEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • 100% of intended weighted task evidence across 2 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Marketing CopyEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Chat & RoleplayEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Creative WritingEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Frontend & UIEstablished evidence

    100% of intended weighted task evidence across 3 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for WritingEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • 100% of intended weighted task evidence across 2 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Math & ReasoningEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • 100% of intended weighted task evidence across 2 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Code CompletionEstablished evidence

    81% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

  • 67% of intended weighted task evidence across 2 independent sources. 3 of 4 configured evaluation feeds currently have results.

  • 65% of intended weighted task evidence across 2 independent sources. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for Fast SummariesEstablished evidence

    64% of intended weighted task evidence across 2 independent sources. 3 of 4 configured evaluation feeds currently have results.

  • Best Value LLMEstablished evidence

    64% of intended weighted task evidence across 2 independent sources. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for CodingProvisional evidence

    58% of intended weighted task evidence across 3 independent sources; broader independent confirmation is still missing from Aider Polyglot or SWE-bench Verified. 8 of 8 configured evaluation feeds currently have results.

  • 55% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from WMT translation. 4 of 5 configured evaluation feeds currently have results.

  • 55% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from WMT translation. 4 of 5 configured evaluation feeds currently have results.

  • Best LLM for TranslationProvisional evidence

    55% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from WMT translation. 4 of 5 configured evaluation feeds currently have results.

  • Best Cheap LLM for High VolumeProvisional evidence

    50% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Route reliability. 3 of 4 configured evaluation feeds currently have results.

  • Cheapest Capable LLMProvisional evidence

    50% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Route reliability. 3 of 4 configured evaluation feeds currently have results.

  • Best Local LLM for CodingProvisional evidence

    50% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Aider Polyglot or SWE-rebench. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Agentic CodingProvisional evidence

    46% of intended weighted task evidence across 3 independent sources; broader independent confirmation is still missing from Frontier-Bench or SWE-rebench. 8 of 8 configured evaluation feeds currently have results.

  • 40% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Aider Polyglot or SWE-bench Verified. 6 of 6 configured evaluation feeds currently have results.

  • 40% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from FACTS Grounding or LMArena Document. 4 of 6 configured evaluation feeds currently have results.

  • Best LLM for SummarizationProvisional evidence

    40% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from FACTS Grounding or LMArena Document. 4 of 6 configured evaluation feeds currently have results.

  • 39% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Berkeley Function Calling or Structured-output eval. 4 of 5 configured evaluation feeds currently have results.

  • 39% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Berkeley Function Calling or Structured-output eval. 4 of 5 configured evaluation feeds currently have results.

  • 35% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or Structured-output eval. 4 of 5 configured evaluation feeds currently have results.

  • Best LLM for Hermes AgentProvisional evidence

    33% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or SWE-rebench. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for OpenHandsProvisional evidence

    33% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or SWE-rebench. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for GooseProvisional evidence

    33% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or SWE-rebench. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for OpenClawProvisional evidence

    33% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or SWE-rebench. 5 of 5 configured evaluation feeds currently have results.

  • 31% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Route reliability or Structured-output eval. 2 of 4 configured evaluation feeds currently have results.

  • Best LLM for Grounded RAGProvisional evidence

    30% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from CRAG or FACTS Grounding. 2 of 5 configured evaluation feeds currently have results.

  • 29% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from FACTS Grounding or LMArena Document. 4 of 6 configured evaluation feeds currently have results.

  • Best LLM for AI AgentsProvisional evidence

    27% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Berkeley Function Calling or OSWorld Verified. 7 of 7 configured evaluation feeds currently have results.

  • Best LLM for Autonomous AgentsProvisional evidence

    25% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Frontier-Bench or OSWorld Verified. 7 of 7 configured evaluation feeds currently have results.

  • Best LLM for Massive ContextProvisional evidence

    25% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Document or LongBench v2. 3 of 4 configured evaluation feeds currently have results.

  • 25% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or OSWorld Verified. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for OCR & DocumentsProvisional evidence

    25% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Document or Structured-output eval. 3 of 5 configured evaluation feeds currently have results.

  • 25% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Document or Structured-output eval. 3 of 5 configured evaluation feeds currently have results.

  • Best LLM for Charts & DiagramsProvisional evidence

    25% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Document or Structured-output eval. 3 of 5 configured evaluation feeds currently have results.

  • Best LLM for Document ParsingProvisional evidence

    25% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Document or Structured-output eval. 3 of 5 configured evaluation feeds currently have results.

Recommendation coverage

Where this model appears

Not currently included in a published recommendation. The task evidence panel above says exactly what is confirmed and what is still missing.

Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.