OpenAI model product
GPT-5.1-Codex-Mini
1 Codex Mini is a fast, efficient coding model optimized for quick code completion, simple refactoring, and routine programming tasks.
Updated Aug 12, 2026. Default version: GPT-5.1 Codex Mini
LLMBoard score0.0GPT-5.1 Codex Mini
Coverage20%1 benchmark families
Context window400KTokens
Official input priceN/AOfficial price unavailable
GPT-5.1-Codex-Mini Specifications
Technical details for the model's default version.
- Version
- GPT-5.1 Codex Mini
- Released
- Nov 12, 2025
- Knowledge cutoff
- Sep 30, 2024
- Parameters
- N/A
- Context window
- 400K
- Max output
- 128K
- Inputs
- image, text
- Outputs
- text
- Open weights
- No
- License
- Proprietary
GPT-5.1-Codex-Mini Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
GPT-5.1-Codex-Mini Benchmark Results
Benchmark scores for GPT-5.1 Codex Mini.
| AIME 2025 | 42.1% | 108 | 114 | 5.3% | C |
GPT-5.1-Codex-Mini Arena Results
Preference and agent-evaluation results for the default version.
| webdev | overall | 99 | 1243.4 | 1,133 | N/A |
GPT-5.1-Codex-Mini Runtime Performance
Provider-specific output speed and catalog latency for GPT-5.1 Codex Mini. Runtime does not affect the capability score.
| OpenAI | 200 tok/s | 1 s | 400K | 128K |
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
GPT-5.1-Codex-Mini Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- N/A
- Official provider
- N/A
- Lowest third-party
- From $0.22 input, $1.8 output per 1M via Poe
- Tracked offerings
- 16
| Poe | openai/gpt-5.1-codex-mini | global | $0.22 | $1.8 | 400K | |
| Jiekou.AI | gpt-5.1-codex-mini | global | $0.225 | $1.8 | 400K | |
| Impossibl | openai/gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| NanoGPT | openai/gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| LLM Gateway | gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| OpenCode Zen | gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| Helicone | gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| ZenMux | openai/gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| Azure Cognitive Services | gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| Azure | gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| AIHubMix | gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| Ofox | openai/gpt-5.1-codex-mini | global | $0.25 | $2 | 256K | |
| OrcaRouter | openai/gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| Kilo Gateway | openai/gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| Vercel AI Gateway | openai/gpt-5.1-codex-mini | global | $0.25 | $2 | 400K | |
| OpenRouter | openai/gpt-5.1-codex-mini | global | $0.25 | $2 | 400K |
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
GPT-5.1-Codex-Mini Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
| GPT-5.1 Codex Mini | 0.0 | N/A | 400K | 128K | No | Proprietary |
What is GPT-5.1-Codex-Mini?
Key information about GPT-5.1-Codex-Mini and its available data.
1 Codex Mini is a fast, efficient coding model optimized for quick code completion, simple refactoring, and routine programming tasks. It provides excellent performance for everyday coding needs with lower latency.
Data as of 2026-08-11.
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FAQ
Common questions about GPT-5.1-Codex-Mini.
When was GPT-5.1-Codex-Mini released?
GPT-5.1-Codex-Mini's default version was released on Nov 12, 2025.
How much does GPT-5.1-Codex-Mini cost?
No official standard PAYG price is currently available for GPT-5.1-Codex-Mini. The lowest tracked third-party offer starts at $0.22 input and $1.8 output via Poe.
Who created GPT-5.1-Codex-Mini?
GPT-5.1-Codex-Mini was created by OpenAI.
What is the context window for GPT-5.1-Codex-Mini?
The default version has a 400K token context window.
Is GPT-5.1-Codex-Mini open weight?
No. The default version is not marked as having publicly available weights.
How many API providers offer GPT-5.1-Codex-Mini?
16 provider offerings are linked to the default version.
What models should I compare GPT-5.1-Codex-Mini with?
Nearby ranked alternatives include Qwen3.5 0.8B, Pixtral 12B, Gemma 3n E4B.