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 17, 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 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.
Sort by
Benchmark | Score | Rank | Participants | Percentile | Evidence | Evaluated |
|---|
| BenchmarkAIME 2025 | Score42.1% | Rank109 | Participants115 | Percentile5.3% | EvidenceC | Evaluated |
GPT-5.1-Codex-Mini Arena Results
Preference and agent-evaluation results for the default version.
Sort by
Arena | Category | Rank | Rating / score | Votes | Observations | Result date |
|---|
| Arenawebdev | Categoryoverall | Rank103 | Rating / score1243.6 | Votes1,133 | ObservationsN/A | Result date |
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
- 17
Sort by
Provider | Provider model ID | Region | Input / 1M | Output / 1M | Context | Updated |
|---|
| ProviderPoe | Provider model IDopenai/gpt-5.1-codex-mini | Regionglobal | Input / 1M$0.22 | Output / 1M$1.8 | Context400K | Updated |
| ProviderJiekou.AI | Provider model IDgpt-5.1-codex-mini | Regionglobal | Input / 1M$0.225 | Output / 1M$1.8 | Context400K | Updated |
| ProviderOrcaRouter | Provider model IDopenai/gpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderNanoGPT | Provider model IDopenai/gpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderImpossibl | Provider model IDopenai/gpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderOpenRouter | Provider model IDopenai/gpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderZenMux | Provider model IDopenai/gpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderOfox | Provider model IDopenai/gpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context256K | Updated |
| ProviderHelicone | Provider model IDgpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderAzure Cognitive Services | Provider model IDgpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderOpenCode Zen | Provider model IDgpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderAzure | Provider model IDgpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderAIHubMix | Provider model IDgpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderVercel AI Gateway | Provider model IDopenai/gpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderEden AI | Provider model IDazure/gpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context272K | Updated |
| ProviderLLM Gateway | Provider model IDgpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
| ProviderKilo Gateway | Provider model IDopenai/gpt-5.1-codex-mini | Regionglobal | Input / 1M$0.25 | Output / 1M$2 | Context400K | Updated |
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 Runtime Performance
Provider-specific output speed and catalog latency for GPT-5.1 Codex Mini. Runtime does not affect the capability score.
Sort by
Provider | Output Speed | Catalog Latency | Max Input | Max Output | Updated |
|---|
| ProviderOpenAI | Output Speed200 tok/s | Catalog Latency1 s | Max Input400K | Max Output128K | Updated |
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
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 Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
Sort by
Version | Released | LLMBoard | Parameters | Context | Max output | Open weights | License |
|---|
| VersionGPT-5.1 Codex Mini | Released | LLMBoard0.0 | ParametersN/A | Context400K | Max output128K | Open weightsNo | LicenseProprietary |
GPT-5.1-Codex-Mini vs nearby models
Open a comparison with the three ranked models immediately above and below this model.
Models similar to GPT-5.1-Codex-Mini
Recommendations prioritize the same model type and family, then the closest LLMBoard score.
OP
GPT-3.5-Turbo
OpenAI
OP
GPT-4.1-nano
OpenAI
OP
GPT-4
OpenAI
OP
GPT-4o-mini
OpenAI
OP
GPT-4-Turbo
OpenAI
OP
o1 mini
OpenAI
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 2026-08-17.
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?
17 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.