GPT-5.2-Codex
openai/gpt-5.2-codex-20260114
OpenAI's GPT-5.2-Codex processes text and image inputs to generate text output, with a context length of 400 000 tokens. The model supports tool usage and reasoning, is not released with open weights, and costs $1.75 per M input tokens and $14 per M output tokens. It was released on 2026‑01‑14.
- tool use
- structured outputs
- reasoning
At a glance
Specifications
What the API gives you
- Context window
- 400K tokens
- Max output
- 128K tokens
- Input price
- $1.75 / 1M tokens
- Output price
- $14 / 1M tokens
- Cache read
- $0.17 / 1M tokens
- Modalities
- text, image → text
- Knowledge cutoff
- —
- Released
- Jan 15, 2025
Measured evidence
Public benchmark record
- Design Arena Full-stack Agent
- 1039 Elo2026-07-28
- Design Arena Full-stack Agent
- 1041 Elo2026-07-27
- Design Arena Full-stack Agent
- 1032 Elo2026-07-30
- Design Arena Full-stack Agent
- 1032 Elo2026-07-29
- Design Arena Full-stack Agent
- 1032 Elo2026-07-31
- Design Arena Full-stack Agent
- 1034 Elo2026-08-02
- Design Arena Full-stack Agent
- 1034 Elo2026-08-01
- Design Arena Full-stack Agent
- 1034 Elo2026-08-05
- Design Arena Full-stack Agent
- 1026 Elo2026-08-09
- Design Arena Full-stack Agent
- 1036 Elo2026-08-03
- Design Arena Full-stack Agent
- 1035 Elo2026-08-04
- Design Arena Full-stack Agent
- 1025 Elo2026-08-14
- Design Arena Full-stack Agent
- 1034 Elo2026-08-06
- Design Arena Full-stack Agent
- 1023 Elo2026-08-10
- Design Arena Full-stack Agent
- 1034 Elo2026-08-07
- Design Arena Full-stack Agent
- 1023 Elo2026-08-18
- Design Arena Full-stack Agent
- 1034 Elo2026-08-08
- Design Arena Full-stack Agent
- 1027 Elo2026-08-11
- Design Arena Full-stack Agent
- 1028 Elo2026-08-15
- Design Arena Full-stack Agent
- 1027 Elo2026-08-12
- Design Arena Full-stack Agent
- 1025 Elo2026-08-13
- Design Arena Full-stack Agent
- 1023 Elo2026-08-19
- Design Arena Full-stack Agent
- 1017 Elo2026-08-27
- Design Arena Full-stack Agent
- 1023 Elo2026-08-20
- Design Arena Full-stack Agent
- 1028 Elo2026-08-16
- Design Arena Full-stack Agent
- 1007 Elo2026-09-05
- Design Arena Full-stack Agent
- 1028 Elo2026-08-17
- Design Arena Full-stack Agent
- 1026 Elo2026-08-21
- Design Arena Full-stack Agent
- 1026 Elo2026-08-22
- Design Arena Full-stack Agent
- 1026 Elo2026-08-23
- Design Arena Full-stack Agent
- 1016 Elo2026-08-28
- Design Arena Full-stack Agent
- 1013 Elo2026-08-24
- Design Arena Full-stack Agent
- 1017 Elo2026-08-25
- Design Arena Full-stack Agent
- 1017 Elo2026-08-26
- Design Arena Full-stack Agent
- 1004 Elo2026-09-06
- Design Arena Full-stack Agent
- 1016 Elo2026-08-29
- Design Arena Full-stack Agent
- 1016 Elo2026-08-30
- Design Arena Full-stack Agent
- 1016 Elo2026-08-31
- Design Arena Full-stack Agent
- 1017 Elo2026-09-01
- Design Arena Full-stack Agent
- 1017 Elo2026-09-02
- Design Arena Full-stack Agent
- 1017 Elo2026-09-03
- Design Arena Full-stack Agent
- 1017 Elo2026-09-04
- Design Arena Web-app Agent
- 1109 Elo2026-07-28
- Design Arena Web-app Agent
- 1109 Elo2026-07-27
- Design Arena Web-app Agent
- 1106 Elo2026-07-30
- Design Arena Web-app Agent
- 1106 Elo2026-07-29
- Design Arena Web-app Agent
- 1106 Elo2026-07-31
- Design Arena Web-app Agent
- 1106 Elo2026-08-02
- Design Arena Web-app Agent
- 1106 Elo2026-08-01
- Design Arena Web-app Agent
- 1099 Elo2026-08-05
- Design Arena Web-app Agent
- 1094 Elo2026-08-09
- Design Arena Web-app Agent
- 1106 Elo2026-08-03
- Design Arena Web-app Agent
- 1107 Elo2026-08-04
- Design Arena Web-app Agent
- 1089 Elo2026-08-14
- Design Arena Web-app Agent
- 1100 Elo2026-08-06
- Design Arena Web-app Agent
- 1091 Elo2026-08-10
- Design Arena Web-app Agent
- 1100 Elo2026-08-07
- Design Arena Web-app Agent
- 1100 Elo2026-08-08
- Design Arena Web-app Agent
- 1088 Elo2026-08-18
- Design Arena Web-app Agent
- 1091 Elo2026-08-11
- Design Arena Web-app Agent
- 1089 Elo2026-08-15
- Design Arena Web-app Agent
- 1092 Elo2026-08-12
- Design Arena Web-app Agent
- 1090 Elo2026-08-13
- Design Arena Web-app Agent
- 1088 Elo2026-08-19
- Design Arena Web-app Agent
- 1082 Elo2026-08-27
- Design Arena Web-app Agent
- 1088 Elo2026-08-20
- Design Arena Web-app Agent
- 1091 Elo2026-08-16
- Design Arena Web-app Agent
- 1092 Elo2026-08-17
- Design Arena Web-app Agent
- 1081 Elo2026-09-05
- Design Arena Web-app Agent
- 1088 Elo2026-08-21
- Design Arena Web-app Agent
- 1088 Elo2026-08-22
- Design Arena Web-app Agent
- 1088 Elo2026-08-23
- Design Arena Web-app Agent
- 1082 Elo2026-08-28
- Design Arena Web-app Agent
- 1083 Elo2026-08-24
- Design Arena Web-app Agent
- 1084 Elo2026-08-25
- Design Arena Web-app Agent
- 1084 Elo2026-08-26
- Design Arena Web-app Agent
- 1081 Elo2026-09-06
- Design Arena Web-app Agent
- 1082 Elo2026-08-29
- Design Arena Web-app Agent
- 1082 Elo2026-08-30
- Design Arena Web-app Agent
- 1082 Elo2026-08-31
- Design Arena Web-app Agent
- 1081 Elo2026-09-01
- Design Arena Web-app Agent
- 1081 Elo2026-09-02
- Design Arena Web-app Agent
- 1081 Elo2026-09-03
- Design Arena Web-app Agent
- 1081 Elo2026-09-04
- LiveBench Agentic Coding
- 49.4%2026-06-25
- LiveBench Coding
- 83.6%2026-06-25
- LiveBench Data Analysis
- 78.2%2026-06-25
- LiveBench Instruction Following
- 66.5%2026-06-25
- LiveBench Language
- 73.7%2026-06-25
- LiveBench Math
- 88.8%2026-06-25
- LiveBench Reasoning
- 77.7%2026-06-25
- LMArena WebDev
- 1334 Elo2026-07-16
- LMArena WebDev
- 1334 Elo2026-07-21
- LMArena WebDev
- 1334 Elo2026-07-20
- LMArena WebDev
- 1338 Elo2026-07-27
- LMArena WebDev
- 1338 Elo2026-07-24
- LMArena WebDev
- 1338 Elo2026-07-28
- LMArena WebDev
- 1338 Elo2026-07-30
- LMArena WebDev
- 1338 Elo2026-08-01
- LMArena WebDev
- 1338 Elo2026-07-31
- LMArena WebDev
- 1338 Elo2026-08-06
- LMArena WebDev
- 1338 Elo2026-08-02
- LMArena WebDev
- 1338 Elo2026-08-12
- LMArena WebDev
- 1338 Elo2026-08-10
- LMArena WebDev
- 1338 Elo2026-08-14
- LMArena WebDev
- 1339 Elo2026-09-01
- LMArena WebDev
- 1338 Elo2026-09-05
- LMArena WebDev
- 1338 Elo2026-08-21
- LMArena WebDev
- 1338 Elo2026-08-30
- SWE-rebench‡
- 51.3% ± 1.22026-03-01tools
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 Code CompletionEstablished evidence
81% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.
- Best LLM for Debugging & Code ReviewEstablished evidence
70% of intended weighted task evidence across 3 independent sources. 6 of 6 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 CodingEstablished evidence
60% of intended weighted task evidence across 3 independent sources. 8 of 8 configured evaluation feeds currently have results.
- Best LLM for Competition MathProvisional evidence
65% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Instruction Following or LMArena Math. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for Math & ReasoningProvisional evidence
65% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Instruction Following or LMArena Math. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for Logic & Problem SolvingProvisional evidence
60% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Instruction Following or LMArena Math. 5 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 LLM for a General AssistantProvisional evidence
55% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Instruction Following or LMArena Text. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for Creative WritingProvisional evidence
50% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Text. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for WritingProvisional evidence
50% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Text. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for Fast SummariesProvisional evidence
50% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or Route reliability. 3 of 4 configured evaluation feeds currently have results.
- Best Value LLMProvisional evidence
43% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or Route reliability. 3 of 4 configured evaluation feeds currently have results.
- Best Cheap LLM for High VolumeProvisional evidence
42% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or Route reliability. 3 of 4 configured evaluation feeds currently have results.
- Cheapest Capable LLMProvisional evidence
42% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or Route reliability. 3 of 4 configured evaluation feeds currently have results.
- Best Open-Weight LLM for Self-HostingProvisional evidence
42% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or Route reliability. 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.
- Best LLM for Literary TranslationProvisional evidence
40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or WMT translation. 4 of 5 configured evaluation feeds currently have results.
- Best LLM for Everyday TranslationProvisional evidence
40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or WMT translation. 4 of 5 configured evaluation feeds currently have results.
- Best LLM for TranslationProvisional evidence
40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Text or WMT translation. 4 of 5 configured evaluation feeds currently have results.
- Best LLM for Business WritingProvisional evidence
40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Instruction Following. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for Marketing CopyProvisional evidence
40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Instruction Following. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for Chat & RoleplayProvisional evidence
40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Text. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for Frontend & UIProvisional evidence
40% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Design Arena Coding or Design Arena UI. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for Roleplay & CharacterProvisional evidence
40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Creative Writing or LMArena Text. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for High-Volume ExtractionProvisional evidence
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 Document SummarizationProvisional evidence
30% 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 SummarizationProvisional evidence
30% 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
30% of intended weighted task evidence across 2 independent sources; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Agent. 7 of 7 configured evaluation feeds currently have results.
- Best LLM for JSON & Schema OutputProvisional evidence
28% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Text. 4 of 5 configured evaluation feeds currently have results.
- Best LLM for Structured Data ExtractionProvisional evidence
28% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Text. 4 of 5 configured evaluation feeds currently have results.
- Best LLM for Image UnderstandingProvisional evidence
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 Hermes AgentProvisional evidence
18% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Agent. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for OpenHandsProvisional evidence
18% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Agent. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for GooseProvisional evidence
18% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Agent. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for OpenClawProvisional evidence
18% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Agent. 5 of 5 configured evaluation feeds currently have results.
- Best LLM for Tool & Function CallingProvisional evidence
10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Agent. 4 of 5 configured evaluation feeds currently have results.
- Best LLM for Computer & Browser UseProvisional evidence
10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Agent. 4 of 4 configured evaluation feeds currently have results.
- Best LLM for OCR & DocumentsProvisional evidence
10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from LMArena Document or LMArena Vision. 3 of 5 configured evaluation feeds currently have results.
- Best LLM for Vision & DocumentsProvisional evidence
10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from LMArena Document or LMArena Vision. 3 of 5 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.
- Best LLM for Charts & DiagramsProvisional evidence
10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from LMArena Document or LMArena Vision. 3 of 5 configured evaluation feeds currently have results.
- Best LLM for Document ParsingProvisional evidence
10% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from LMArena Document or LMArena Vision. 3 of 5 configured evaluation feeds currently have results.
- Best LLM for Massive ContextProvisional evidence
6% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from LMArena Document or LMArena Long Query. 3 of 4 configured evaluation feeds currently have results.
- Best LLM for RAG & Long ContextProvisional evidence
6% of intended weighted task evidence across 0 independent sources; broader independent confirmation is still missing from FACTS Grounding or LMArena Document. 4 of 6 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.