GPT-5.1-Codex-Mini
openai/gpt-5.1-codex-mini- OpenAI
- Family · GPT-5-Codex-Mini
- Released 13 Nov 2025
- Image · Text → Text
- Reasoning · adjustable
- Tools · JSON · Vision
Not on OSMEXO yet
Spec & list price
Context391K
Max output128K
Input / 1M$0.25
Output / 1M$2.008× input
Scores · standing
Intelligence20.4#139/490
Usage
Tokens / day42.0M▼ 28% 7d
Usage rank#348
Requests / day3.3K
Tool calls / req0.36
Per request · 30 days
Avg input15.2Kabout median
Avg output1.1K1.6× median
Cache hit83%1.2× median
Reasoning share78%1.4× median
Tool-call failures0.7%0.4× median
Consumption
Peak 296.1M 7 OctLow 22.9M 1 NovRank today #348
News & trends
News · latest from OpenAI
- GPT-6.1 Terra vs. Claude Opus 5.5: Cheaper and faster in three tests at maxthenewstack.io · 2 Nov
- Chinese labs now target OpenAI's GPT-6 Astra for distillationfork.zone · 1 Nov
- GPT-6.1 Terrasimonwillison.net · 31 Oct
- GPT-5.6 Sol can beat Factorio on peaceful moderyanmadden.net · 31 Oct
Benchmarks
bar = share of the top score · Benchmark data: Artificial AnalysisSpeed · median across providers, latest day
Output speed#159/33469 tok/sabout median
First token#2722.15 s2.1× longer than median
#13 cheapest of 26 with a similar score
Value
Intelligence Index
Blended price per 1M tokens (log)
Technical details
- Reasoning
- on · medium
- Tokenizer
- GPT
- Moderation
- none
Reasoning effort
- high
- medium · default
- low
Request parameters 10
- tools
- tool_choice
- response_format
- structured_outputs
- reasoning
- reasoning_effort
- include_reasoning
- max_completion_tokens
- seed
- verbosity
When to use
Best for
- Cost-conscious coding agents
- Code edits and refactors in large repositories
- Screenshot-to-code and UI bug triage
- Math-heavy and structured reasoning tasks
Think twice for
- Open-ended creative writing
- Self-hosting (closed weights)
- Hardest research-grade reasoning problems
Alternatives
other vendors · similar capability- 21.8
- 18.2
- 21.5
- 22.2
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