GPT-5.1 Codex Mini
by OpenAIChatdeprecated 2026-07-23
Coding-optimized GPT model for repository edits, reviews, and agentic software work
- Context
- 400K tokens
- Max output
- 128,000 tokens
- Released
- 2025-11-13
- Weights
- Closed
openai/gpt-5-1-codex-mini · also seen as azure/gpt-5.1-codex-mini, eu/gpt-5.1-codex-mini, global/gpt-5.1-codex-mini, gpt-5.1-codex-mini-2025-11-13, +2 more
Specifications
Full facts as recorded, incl. what is unknown.
- Released
- 2025-11-13
- Weights
- Closed
- Input
- Text, Image
- Output
- Text
- Context window
- 400,000 max across endpoints
- Max output
- 128,000
- Providers
- 4 + 16 gateways, not counted as providers
- Epoch Capabilities Index
- not evaluated
- Direct price range
- $0.25 in · $2.00 out per 1M tokens · 2 of 4 providers have a comparable price
More details
- Last updated
- 2026-01
- Knowledge cutoff
- 2024-09-30
- Developer country
- United States of America
Capabilities
Across all endpoints: supported if any endpoint supports it.
- Tool calling
- Parallel tools
- Structured output
- Reasoning
- Image input
- PDF input
- Audio input
- Audio outputunknown
- Video input
- Prompt caching
- Web searchunknown
- Computer useunknown
- System messages
- Assistant prefillunknown
- Temperature
- Streaming
- Attachments
Endpoints
One row per provider and variant; gateways are listed separately.
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Price history
Atom feedNo change since 19 Oct 2026. The cheapest direct price has been $0.25 in / $2.00 out per 1M tokens at Azure on every data refresh since then.
Tracked from 19 Oct 2026. Headline-eligible direct prices only, so a price the sanity check flags never draws a spike. Series as JSON
Cost calculator
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Similarly priced models
Blended rate per 1M tokens, each at its own cheapest provider (10M input : 2M output mix).
| Model | Blended/1M | In/1M | Out/1M | Context | vs GPT-5.1 Codex Mini |
|---|---|---|---|---|---|
| GPT-5 MiniOpenAI | $0.488 | $0.225 | $1.80 | 400K | +0% |
| Qwen3-Coder 480B-A35B InstructAlibaba (Qwen) | $0.483 | $0.22 | $1.80 | 262K | −1% cheaper |
| Llama 3.1 70B Dracarys 2Abacus.AI | $0.493 | $0.493 | $0.493 | 32.8K | +1% |
| Llama 3.1 70B HanamiSao10K | $0.493 | $0.493 | $0.493 | 32.8K | +1% |
| Llama 3.3 70B EuryaleSao10K | $0.493 | $0.493 | $0.493 | 131K | +1% |
| UnslopNemo 12b v4TheDrummer | $0.493 | $0.493 | $0.493 | 8.2K | +1% |
| WizardLM-2 8x22BMicrosoft | $0.48 | $0.48 | $0.48 | 65.5K | −2% cheaper |
| Qwen3.5 Plus 2026-02-15Alibaba (Qwen) | $0.477 | $0.26 | $1.56 | 1M | −2% cheaper |
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