Claude Opus 4.5

anthropic/claude-4.5-opus-20251124

Claude Opus 4.5, from Anthropic, accepts file, image, and text inputs and produces text output. It supports tool usage and reasoning, provides a context length of 200 000 tokens, and is priced at $5 per million input tokens and $25 per million output tokens. The model was released on 2025‑11‑24 and its weights are not open.

  • tool use
  • structured outputs
  • reasoning

At a glance

provideranthropic
releasedNov 1, 2025
context200K
input / M$5

Specifications

What the API gives you

Context window
200K tokens
Max output
64K tokens
Input price
$5 / 1M tokens
Output price
$25 / 1M tokens
Cache read
$0.50 / 1M tokens
Modalities
file, image, text → text
Knowledge cutoff
Released
Nov 1, 2025

Measured evidence

Public benchmark record

BFCL
77.5%2026-07-28
BFCL
77.5%2026-07-27
BFCL
77.5%2026-07-29
BFCL
77.5%2026-07-31
BFCL
77.5%2026-07-30
BFCL
77.5%2026-08-02
BFCL
77.5%2026-08-01
BFCL
77.5%2026-08-05
BFCL
77.5%2026-08-03
BFCL
77.5%2026-08-09
BFCL
77.5%2026-08-04
BFCL
77.5%2026-08-06
BFCL
77.5%2026-08-07
BFCL
77.5%2026-08-14
BFCL
77.5%2026-08-10
BFCL
77.5%2026-08-08
BFCL
77.5%2026-08-18
BFCL
77.5%2026-08-11
BFCL
77.5%2026-08-15
BFCL
77.5%2026-08-12
BFCL
77.5%2026-08-13
BFCL
77.5%2026-08-19
BFCL
77.5%2026-08-16
BFCL
77.5%2026-08-20
BFCL
77.5%2026-08-27
BFCL
77.5%2026-08-17
BFCL
77.5%2026-08-21
BFCL
77.5%2026-08-22
BFCL
77.5%2026-08-23
BFCL
77.5%2026-08-24
BFCL
77.5%2026-09-05
BFCL
77.5%2026-08-28
BFCL
77.5%2026-08-25
BFCL
77.5%2026-08-26
BFCL
77.5%2026-09-06
BFCL
77.5%2026-08-29
BFCL
77.5%2026-08-30
BFCL
77.5%2026-08-31
BFCL
77.5%2026-09-01
BFCL
77.5%2026-09-02
BFCL
77.5%2026-09-03
BFCL
77.5%2026-09-04
Design Arena Coding
1273 Elo2026-07-28
Design Arena Coding
1273 Elo2026-07-27
Design Arena Coding
1273 Elo2026-07-30
Design Arena Coding
1273 Elo2026-07-29
Design Arena Coding
1273 Elo2026-07-31
Design Arena Coding
1272 Elo2026-08-02
Design Arena Coding
1271 Elo2026-08-05
Design Arena Coding
1272 Elo2026-08-01
Design Arena Coding
1270 Elo2026-08-09
Design Arena Coding
1272 Elo2026-08-03
Design Arena Coding
1272 Elo2026-08-04
Design Arena Coding
1267 Elo2026-08-14
Design Arena Coding
1271 Elo2026-08-06
Design Arena Coding
1270 Elo2026-08-10
Design Arena Coding
1271 Elo2026-08-07
Design Arena Coding
1262 Elo2026-08-18
Design Arena Coding
1270 Elo2026-08-08
Design Arena Coding
1262 Elo2026-08-15
Design Arena Coding
1270 Elo2026-08-11
Design Arena Coding
1269 Elo2026-08-12
Design Arena Coding
1268 Elo2026-08-13
Design Arena Coding
1261 Elo2026-08-19
Design Arena Coding
1266 Elo2026-08-27
Design Arena Coding
1267 Elo2026-08-21
Design Arena Coding
1261 Elo2026-08-20
Design Arena Coding
1262 Elo2026-08-16
Design Arena Coding
1259 Elo2026-09-05
Design Arena Coding
1262 Elo2026-08-17
Design Arena Coding
1267 Elo2026-08-22
Design Arena Coding
1267 Elo2026-08-23
Design Arena Coding
1266 Elo2026-08-28
Design Arena Coding
1267 Elo2026-08-24
Design Arena Coding
1267 Elo2026-08-25
Design Arena Coding
1267 Elo2026-08-26
Design Arena Coding
1258 Elo2026-09-06
Design Arena Coding
1266 Elo2026-08-29
Design Arena Coding
1266 Elo2026-08-30
Design Arena Coding
1266 Elo2026-08-31
Design Arena Coding
1266 Elo2026-09-01
Design Arena Coding
1265 Elo2026-09-02
Design Arena Coding
1262 Elo2026-09-03
Design Arena Coding
1261 Elo2026-09-04
Design Arena UI
1275 Elo2026-07-28
Design Arena UI
1275 Elo2026-07-27
Design Arena UI
1275 Elo2026-07-30
Design Arena UI
1275 Elo2026-07-29
Design Arena UI
1275 Elo2026-07-31
Design Arena UI
1275 Elo2026-08-02
Design Arena UI
1275 Elo2026-08-01
Design Arena UI
1274 Elo2026-08-05
Design Arena UI
1272 Elo2026-08-09
Design Arena UI
1275 Elo2026-08-03
Design Arena UI
1275 Elo2026-08-04
Design Arena UI
1270 Elo2026-08-14
Design Arena UI
1274 Elo2026-08-06
Design Arena UI
1274 Elo2026-08-07
Design Arena UI
1272 Elo2026-08-10
Design Arena UI
1272 Elo2026-08-08
Design Arena UI
1265 Elo2026-08-18
Design Arena UI
1272 Elo2026-08-11
Design Arena UI
1266 Elo2026-08-15
Design Arena UI
1272 Elo2026-08-12
Design Arena UI
1272 Elo2026-08-13
Design Arena UI
1265 Elo2026-08-19
Design Arena UI
1266 Elo2026-08-16
Design Arena UI
1265 Elo2026-08-20
Design Arena UI
1264 Elo2026-08-27
Design Arena UI
1265 Elo2026-08-17
Design Arena UI
1260 Elo2026-09-05
Design Arena UI
1265 Elo2026-08-21
Design Arena UI
1265 Elo2026-08-22
Design Arena UI
1265 Elo2026-08-23
Design Arena UI
1264 Elo2026-08-28
Design Arena UI
1265 Elo2026-08-24
Design Arena UI
1265 Elo2026-08-25
Design Arena UI
1265 Elo2026-08-26
Design Arena UI
1261 Elo2026-09-06
Design Arena UI
1264 Elo2026-08-29
Design Arena UI
1265 Elo2026-08-30
Design Arena UI
1264 Elo2026-08-31
Design Arena UI
1264 Elo2026-09-01
Design Arena UI
1264 Elo2026-09-02
Design Arena UI
1262 Elo2026-09-03
Design Arena UI
1260 Elo2026-09-04
Design Arena Web-app Agent
1213 Elo2026-07-28
Design Arena Web-app Agent
1213 Elo2026-07-27
Design Arena Web-app Agent
1212 Elo2026-07-30
Design Arena Web-app Agent
1212 Elo2026-07-29
Design Arena Web-app Agent
1212 Elo2026-07-31
Design Arena Web-app Agent
1212 Elo2026-08-02
Design Arena Web-app Agent
1212 Elo2026-08-01
Design Arena Web-app Agent
1207 Elo2026-08-05
Design Arena Web-app Agent
1202 Elo2026-08-09
Design Arena Web-app Agent
1212 Elo2026-08-03
Design Arena Web-app Agent
1212 Elo2026-08-04
Design Arena Web-app Agent
1196 Elo2026-08-14
Design Arena Web-app Agent
1207 Elo2026-08-06
Design Arena Web-app Agent
1199 Elo2026-08-10
Design Arena Web-app Agent
1207 Elo2026-08-07
Design Arena Web-app Agent
1189 Elo2026-08-18
Design Arena Web-app Agent
1207 Elo2026-08-08
Design Arena Web-app Agent
1199 Elo2026-08-11
Design Arena Web-app Agent
1193 Elo2026-08-15
Design Arena Web-app Agent
1199 Elo2026-08-12
Design Arena Web-app Agent
1199 Elo2026-08-13
Design Arena Web-app Agent
1189 Elo2026-08-19
Design Arena Web-app Agent
1192 Elo2026-08-27
Design Arena Web-app Agent
1189 Elo2026-08-20
Design Arena Web-app Agent
1192 Elo2026-08-16
Design Arena Web-app Agent
1190 Elo2026-09-05
Design Arena Web-app Agent
1192 Elo2026-08-17
Design Arena Web-app Agent
1196 Elo2026-08-21
Design Arena Web-app Agent
1197 Elo2026-08-22
Design Arena Web-app Agent
1197 Elo2026-08-23
Design Arena Web-app Agent
1191 Elo2026-08-28
Design Arena Web-app Agent
1191 Elo2026-08-24
Design Arena Web-app Agent
1192 Elo2026-08-25
Design Arena Web-app Agent
1192 Elo2026-08-26
Design Arena Web-app Agent
1190 Elo2026-09-06
Design Arena Web-app Agent
1191 Elo2026-08-29
Design Arena Web-app Agent
1191 Elo2026-08-30
Design Arena Web-app Agent
1190 Elo2026-08-31
Design Arena Web-app Agent
1190 Elo2026-09-01
Design Arena Web-app Agent
1189 Elo2026-09-02
Design Arena Web-app Agent
1189 Elo2026-09-03
Design Arena Web-app Agent
1189 Elo2026-09-04
Design Arena Website
1272 Elo2026-07-28
Design Arena Website
1272 Elo2026-07-30
Design Arena Website
1272 Elo2026-07-27
Design Arena Website
1272 Elo2026-07-29
Design Arena Website
1272 Elo2026-07-31
Design Arena Website
1271 Elo2026-08-02
Design Arena Website
1271 Elo2026-08-01
Design Arena Website
1271 Elo2026-08-05
Design Arena Website
1271 Elo2026-08-03
Design Arena Website
1270 Elo2026-08-09
Design Arena Website
1271 Elo2026-08-04
Design Arena Website
1267 Elo2026-08-14
Design Arena Website
1271 Elo2026-08-06
Design Arena Website
1271 Elo2026-08-07
Design Arena Website
1270 Elo2026-08-10
Design Arena Website
1270 Elo2026-08-08
Design Arena Website
1259 Elo2026-08-18
Design Arena Website
1270 Elo2026-08-11
Design Arena Website
1259 Elo2026-08-15
Design Arena Website
1269 Elo2026-08-12
Design Arena Website
1267 Elo2026-08-13
Design Arena Website
1259 Elo2026-08-19
Design Arena Website
1259 Elo2026-08-16
Design Arena Website
1259 Elo2026-08-20
Design Arena Website
1267 Elo2026-08-27
Design Arena Website
1259 Elo2026-08-17
Design Arena Website
1262 Elo2026-09-05
Design Arena Website
1267 Elo2026-08-21
Design Arena Website
1267 Elo2026-08-22
Design Arena Website
1267 Elo2026-08-23
Design Arena Website
1267 Elo2026-08-24
Design Arena Website
1267 Elo2026-08-28
Design Arena Website
1267 Elo2026-08-25
Design Arena Website
1267 Elo2026-08-26
Design Arena Website
1260 Elo2026-09-06
Design Arena Website
1266 Elo2026-08-29
Design Arena Website
1266 Elo2026-08-30
Design Arena Website
1266 Elo2026-08-31
Design Arena Website
1266 Elo2026-09-01
Design Arena Website
1265 Elo2026-09-02
Design Arena Website
1263 Elo2026-09-03
Design Arena Website
1262 Elo2026-09-04
LiveBench Coding
79.7%2026-06-25
LiveBench Language
81.3%2026-06-25
LiveBench Math
90.4%2026-06-25
LiveBench Reasoning
80.1%2026-06-25
LMArena Creative Writing
1442 Elo2026-07-21
LMArena Creative Writing
1443 Elo2026-07-27
LMArena Creative Writing
1443 Elo2026-07-30
LMArena Creative Writing
1443 Elo2026-08-02
LMArena Creative Writing
1443 Elo2026-08-03
LMArena Creative Writing
1443 Elo2026-08-06
LMArena Creative Writing
1445 Elo2026-08-12
LMArena Creative Writing
1444 Elo2026-08-21
LMArena Creative Writing
1444 Elo2026-09-02
LMArena Creative Writing
1444 Elo2026-08-27
LMArena Creative Writing
1444 Elo2026-09-01
LMArena Long Query
1479 Elo2026-07-21
LMArena Long Query
1478 Elo2026-07-27
LMArena Long Query
1478 Elo2026-07-30
LMArena Long Query
1479 Elo2026-08-02
LMArena Long Query
1479 Elo2026-08-03
LMArena Long Query
1479 Elo2026-08-06
LMArena Long Query
1480 Elo2026-08-12
LMArena Long Query
1480 Elo2026-08-21
LMArena Long Query
1479 Elo2026-09-02
LMArena Long Query
1480 Elo2026-08-27
LMArena Long Query
1479 Elo2026-09-01
LMArena Math
1460 Elo2026-07-21
LMArena Math
1459 Elo2026-07-27
LMArena Math
1459 Elo2026-07-30
LMArena Math
1459 Elo2026-08-02
LMArena Math
1459 Elo2026-08-03
LMArena Math
1459 Elo2026-08-06
LMArena Math
1460 Elo2026-08-12
LMArena Math
1460 Elo2026-08-21
LMArena Math
1460 Elo2026-09-01
LMArena Math
1460 Elo2026-08-27
LMArena Text
1450 Elo2026-07-16
LMArena Text
1469 Elo2026-07-21
LMArena Text
1473 Elo2026-07-27
LMArena Text
1473 Elo2026-07-30
LMArena Text
1473 Elo2026-08-02
LMArena Text
1473 Elo2026-08-06
LMArena Text
1473 Elo2026-08-03
LMArena Text
1473 Elo2026-08-10
LMArena Text
1473 Elo2026-08-21
LMArena Text
1473 Elo2026-08-12
LMArena Text
1473 Elo2026-09-01
LMArena Text
1473 Elo2026-09-02
LMArena Text
1473 Elo2026-08-27
LMArena WebDev
1466 Elo2026-07-16
LMArena WebDev
1490 Elo2026-07-21
LMArena WebDev
1466 Elo2026-07-20
LMArena WebDev
1494 Elo2026-07-27
LMArena WebDev
1494 Elo2026-07-24
LMArena WebDev
1494 Elo2026-07-28
LMArena WebDev
1494 Elo2026-07-30
LMArena WebDev
1494 Elo2026-08-01
LMArena WebDev
1494 Elo2026-07-31
LMArena WebDev
1494 Elo2026-08-06
LMArena WebDev
1494 Elo2026-08-02
LMArena WebDev
1494 Elo2026-08-12
LMArena WebDev
1495 Elo2026-08-10
LMArena WebDev
1494 Elo2026-08-14
LMArena WebDev
1495 Elo2026-09-01
LMArena WebDev
1495 Elo2026-09-05
LMArena WebDev
1494 Elo2026-08-21
LMArena WebDev
1495 Elo2026-08-30
SWE-bench Verified
79.2%2025-12-15
SWE-bench Verified
79.2%2025-12-05
SWE-rebench
53.1% ± 0.42026-02-01tools

LMArena data licensed CC-BY-4.0. Aider (Apache-2.0) and SWE-bench (MIT) are open. Design Arena uses blind human preference. Submitted scaffold plus model result. Compare the harness and effort settings, not only the model name.

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.

  • 80% of intended weighted task evidence across 4 independent sources. 6 of 6 configured evaluation feeds currently have results.

  • Best LLM for CodingEstablished evidence

    80% of intended weighted task evidence across 5 independent sources. 8 of 8 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.

  • Best Local LLM for CodingEstablished evidence

    64% of intended weighted task evidence across 3 independent sources. 5 of 5 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.

  • 60% of intended weighted task evidence across 2 independent sources. 4 of 6 configured evaluation feeds currently have results.

  • Best LLM for SummarizationEstablished evidence

    60% of intended weighted task evidence across 2 independent sources. 4 of 6 configured evaluation feeds currently have results.

  • 65% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Agent or LMArena Search. 4 of 5 configured evaluation feeds currently have results.

  • Best LLM for AI AgentsProvisional evidence

    60% of intended weighted task evidence across 3 independent sources; broader independent confirmation is still missing from LMArena Agent or OSWorld Verified. 7 of 7 configured evaluation feeds currently have results.

  • 56% of intended weighted task evidence across 3 independent sources; broader independent confirmation is still missing from Structured-output eval. 4 of 5 configured evaluation feeds currently have results.

  • 56% of intended weighted task evidence across 3 independent sources; broader independent confirmation is still missing from Structured-output eval. 4 of 5 configured evaluation feeds currently have results.

  • Best LLM for Hermes AgentProvisional evidence

    55% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from LMArena Agent or Terminal-Bench 2.1. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for OpenHandsProvisional evidence

    55% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from LMArena Agent or Terminal-Bench 2.1. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for GooseProvisional evidence

    55% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from LMArena Agent or Terminal-Bench 2.1. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for OpenClawProvisional evidence

    55% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from LMArena Agent or Terminal-Bench 2.1. 5 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.

  • 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 LLM for Agentic CodingProvisional evidence

    55% of intended weighted task evidence across 3 independent sources; broader independent confirmation is still missing from Frontier-Bench or LMArena Agent. 8 of 8 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 LLM for Massive ContextProvisional evidence

    50% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LongBench v2. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for Autonomous AgentsProvisional evidence

    41% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Frontier-Bench or LMArena Agent. 7 of 7 configured evaluation feeds currently have results.

  • 35% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from FACTS Grounding or LMArena Search. 4 of 6 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 OCR & DocumentsProvisional evidence

    30% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Vision or Structured-output eval. 3 of 5 configured evaluation feeds currently have results.

  • 30% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Vision or Structured-output eval. 3 of 5 configured evaluation feeds currently have results.

  • Best LLM for Charts & DiagramsProvisional evidence

    30% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Vision or Structured-output eval. 3 of 5 configured evaluation feeds currently have results.

  • Best LLM for Document ParsingProvisional evidence

    30% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Vision or Structured-output eval. 3 of 5 configured evaluation feeds currently have results.

  • 20% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Agent or OSWorld Verified. 4 of 4 configured evaluation feeds currently have results.

  • 20% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Vision or VLMEvalKit tasks. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for Grounded RAGProvisional evidence

    10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from CRAG or FACTS Grounding. 2 of 5 configured evaluation feeds currently have results.

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