Updated daily at 05:00 UTC
- Released
- 5 Feb 2026
- Status
- Current
- Context
- 400K
- Max output
- 128K
- Input per 1M tokens
- $1.75
- Output per 1M tokens
- $14.00
- Open weights
- No
- License
- proprietary
- Parameters
- —
- Knowledge cutoff
- 31 Aug 2025
- Reasoning
- Yes
- Modalities
- text, image → text
Category scores
Out of 100, from independent and third-party results only, by method category-2026-09-29.1.
Not enough independent results yet
Only independent and third-party results rank a model; self-reported and unattributed numbers never do.
Benchmark results
Every result we hold for this model, with who ran it and where it was published.
Coding & software engineering
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| METR Time Horizons | Average task success (Epoch's column) | 74.5% | Source not stated | — | — | Epoch AI via Epoch AI |
| SWE-bench Verified | % resolved | 74.8% | Independent | high | 25 Feb 2026 | Epoch AI |
| Terminal-Bench 2.0 | Accuracy (mean over trials) | 78.4% | Third party | — | — | https://www.tbench.ai/leaderboard/terminal-bench/2.0 via Epoch AI |
| Terminal-Bench 2.0 | Accuracy (mean over trials) | 77.3% | Third party | — | — | https://www.tbench.ai/leaderboard/terminal-bench/2.0 via Epoch AI |
| Terminal-Bench 2.0 | Accuracy (mean over trials) | 75.8% | Third party | — | — | https://www.tbench.ai/leaderboard/terminal-bench/2.0 via Epoch AI |
| Terminal-Bench 2.0 | Accuracy (mean over trials) | 75.7% | Third party | — | — | https://www.tbench.ai/leaderboard/terminal-bench/2.0 via Epoch AI |
| Terminal-Bench 2.0 | Accuracy (mean over trials) | 75.1% | Third party | — | — | https://www.tbench.ai/leaderboard/terminal-bench/2.0 via Epoch AI |
| Terminal-Bench 2.0 | Accuracy (mean over trials) | 74.6% | Third party | — | — | https://www.tbench.ai/leaderboard/terminal-bench/2.0 via Epoch AI |
| Terminal-Bench 2.0 | Accuracy (mean over trials) | 71.5% | Third party | — | — | https://www.tbench.ai/leaderboard/terminal-bench/2.0 via Epoch AI |
| Terminal-Bench 2.0 | Accuracy (mean over trials) | 69.1% | Third party | — | — | https://www.tbench.ai/leaderboard/terminal-bench/2.0 via Epoch AI |
| Terminal-Bench 2.0 | Accuracy (mean over trials) | 64.7% | Third party | — | — | https://www.tbench.ai/leaderboard/terminal-bench/2.0 via Epoch AI |
| Terminal-Bench 2.0 | Accuracy (mean over trials) | 70.3% | Source not stated | — | — | Epoch AI via Epoch AI |
| WeirdML (v2) | Average accuracy | 79.3% | Third party | — | — | WeirdML Leaderboard via Epoch AI |
| WeirdML (v2) | Average accuracy | 77.9% | Third party | xhigh | — | https://htihle.github.io/weirdml.html via Epoch AI |
Other Codex versions
- GPT-5.3-Codex-Spark12 Feb 2026
- GPT-5.2-Codex14 Jan 2026
- GPT-5.1-Codex-Max19 Nov 2025
- GPT-5.1-Codex13 Nov 2025
- GPT-5.1-Codex-Mini13 Nov 2025
- GPT-5-Codex15 Sep 2025
- codex-mini15 May 2025
- Codex (code-davinci-002)15 Mar 2022
- Codex (code-cushman-001)Aug 2021
- Codex (code-davinci-001)Aug 2021