GPT-5.1-Codex-Mini
ModelActiveby OpenAI · family “gpt-codex-mini”
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex (description from the OpenRouter listing)
in: imagein: textout: textReasoningTool useStructured output
Epoch Capabilities Index
Not scored by Epoch AI
Released
13 Nov 2025
Context window
400K tokens
Max output
128K tokens
Input $ / 1M tokens
$0.25
Output $ / 1M tokens
$2.00
Cached input $ / 1M
$0.030
Each benchmark shown separately with its own source
Benchmark results (1)
| Benchmark | Domain | Score | vs best recorded | Setting | Run | Source |
|---|---|---|---|---|---|---|
| Terminal Bench | agents | 61.6% ±1.9 | 73% | agent: hookele | 12 Nov 2025 | External ↗ |
Source: Epoch AI Benchmarking Hub (CC BY 4.0). “External” rows are leaderboard results Epoch collects from third parties. Best reported setting per benchmark is shown.
API list price over time
Price history
$ per 1M tokens
11 observations (OpenRouter listing + Internet Archive snapshots). History accumulates with every ingest run; a single point means no change has been observed yet.
Events
- Model launch11mo agoOpenAI releases GPT-5.1-Codex-MiniOpenRouter models API