OpenAI, proprietary
GPT-5.2 Codex
GPT-5.2 Codex by OpenAI ranks 111th of 354 ranked models on the Noometry Index as of October 2026, with a score of 42.6. Its strongest category is agentic & tool use, where it ranks 22nd. API pricing starts at $1.75 per million input tokens and $14 per million output tokens, with a 400K-token context window.
Last verified
Specifications
- Noometry rank
- #111 of 354
- Index score
- 42.6
- Evidence
- Reported 5 results
- Provider
- OpenAI
- Released
- December 18, 2025
- Weights
- Proprietary
- Reasoning
- Yes
- Context window
- 400K
- Max output
- 128K
- Input price
- $1.75 / M
- Output price
- $14 / M
- Blended price
- $4.81 / M
- Output speed
- Not measured
- Value
- #189 of 219
- Knowledge cutoff
- August 2025
- Input
- text, image
Category scores
Each category score combines every public result we have in that category.
- Coding 45.5
- Agentic & Tool Use 41.0
| Category | Score | Rank | Results |
|---|---|---|---|
| Coding | 45.5 | #71 | 3 |
| Agentic & Tool Use | 41.0 | #22 | 1 |
Strengths and weaknesses
Categories where GPT-5.2 Codex places highest and lowest among the models ranked in each, with its score against that category's median.
Strongest categories
| Category | Score | vs median | Rank |
|---|---|---|---|
| Agentic & Tool Use | 41.0 | +10.6 | #22 of 154, top 15% |
Weakest categories
| Category | Score | vs median | Rank |
|---|---|---|---|
| Coding | 45.5 | +6.8 | #71 of 340, top 21% |
Closest competitors
The models ranked just above and below GPT-5.2 Codex. When scores are this close, price and speed are often the better way to choose.
| Model | Rank | Score | Blended $/M | Speed | |
|---|---|---|---|---|---|
| Amazon Nova Experimental Chat 26 01 10 | #107 | 42.8 | — | — | Compare |
| DeepSeek-V3.1 | #108 | 42.8 | $0.42 | 328 | Compare |
| GPT-5.3 Chat | #109 | 42.8 | $4.81 | — | Compare |
| GPT-5.5 Instant | #110 | 42.7 | — | — | Compare |
| Qwen3.5-Flash | #112 | 42.5 | $0.18 | — | Compare |
| Nemotron 3 Ultra | #113 | 42.5 | $0.93 | — | Compare |
| Hunyuan T1 20250711 | #114 | 42.5 | — | — | Compare |
| DeepSeek-R1 | #115 | 42.3 | $0.91 | 10 | Compare |
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Benchmark results
Every published result we track, with its source. Bold rows are the ones used for ranking; where several exist we prefer independent runs over self-reported numbers.
Coding
| Benchmark | Score | Position | Setting | Source | Date |
|---|---|---|---|---|---|
| SWE-bench Verified (bash only) | 72.8% | #8 of 39, top 21% | SWE-bench | 2026-02-19 | |
| LMArena WebDev | 1339 | #91 of 113, top 81% | LMArena | 2026-10-08 | |
| SWE-bench Multilingual | 66.3% | #10 of 13, top 77% | SWE-bench | 2026-02-20 | |
| ALE-Bench | 1,300 | #26 of 105, top 25% | Epoch AI |
Agentic & Tool Use
| Benchmark | Score | Position | Setting | Source | Date |
|---|---|---|---|---|---|
| Terminal-Bench | 66.5% | #8 of 41, top 20% | Epoch AI |
API pricing by provider
| Route | Input $/M | Output $/M | Cached input $/M | Checked |
|---|---|---|---|---|
| azure | $1.75 | $14 | $0.17 | 2026-10-10 |
| openrouter | $1.75 | $14 | $0.17 | 2026-10-10 |
Compare GPT-5.2 Codex
- GPT-5.2 Codex vs GPT-5.1-Codex
- GPT-5.2 Codex vs GPT-5.5 Instant
- GPT-5.2 Codex vs Qwen3.5-Flash
- GPT-5.2 Codex vs GPT-5.3 Chat
- GPT-5.2 Codex vs Nemotron 3 Ultra
- GPT-5.2 Codex vs DeepSeek-V3.1
- GPT-5.2 Codex vs Hunyuan T1 20250711
- GPT-5.2 Codex vs Claude Fable 5.1
- GPT-5.2 Codex vs Gemini 3.8 Flash
- GPT-5.2 Codex vs Kimi K3
- GPT-5.2 Codex vs Grok 4.6
- GPT-5.2 Codex vs Qwen3.8 Max
- GPT-5.2 Codex vs GLM-5.3
- GPT-5.2 Codex vs Muse Spark 1.3
Other OpenAI models
- GPT-6 Astra70.8
- GPT-6.1 Sol65.6
- GPT-5.6 Sol65.0
- GPT-5.5 Pro64.3
- GPT-5.563.4
- GPT-6 Sol61.8
- GPT-5.459.4
- GPT-5.6 Terra59.2
Frequently asked questions
How good is GPT-5.2 Codex?
GPT-5.2 Codex by OpenAI ranks 111th of 354 ranked models on the Noometry Index as of October 2026, with a score of 42.6. Its strongest category is agentic & tool use, where it ranks 22nd. API pricing starts at $1.75 per million input tokens and $14 per million output tokens, with a 400K-token context window.
How much does GPT-5.2 Codex cost?
GPT-5.2 Codex costs $1.75 per million input tokens and $14 per million output tokens on azure, with cached input at $0.17.
What is GPT-5.2 Codex's context window?
GPT-5.2 Codex accepts up to 400K tokens of input and can write up to 128K tokens in one response.
Is GPT-5.2 Codex open source?
No. GPT-5.2 Codex is proprietary and available only through OpenAI's API and partner platforms.
What are GPT-5.2 Codex's strengths and weaknesses?
Relative to other ranked models, GPT-5.2 Codex places best in agentic & tool use and lowest in coding.
What is GPT-5.2 Codex best at?
Its best category is agentic & tool use, where it ranks 22nd on Noometry.