OpenAI: Gpt 5.1 codex
openai/gpt-5.1-codex
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks. The model supports building projects from scratch, feature development, debugging, large-scale refactoring, and code review. Compared to GPT-5.1, Codex is more steerable, adheres closely to developer instructions, and produces cleaner, higher-quality code outputs. Reasoning effort can be adjusted with the reasoning.effort parameter. Codex integrates into developer environments including the CLI, IDE extensions, GitHub, and cloud tasks. It adapts reasoning effort dynamically—providing fast responses for small tasks while sustaining extended multi-hour runs for large projects. The model is trained to perform structured code reviews, catching critical flaws by reasoning over dependencies and validating behavior against tests. It also supports multimodal inputs such as images or screenshots for UI development and integrates tool use for search, dependency installation, and environment setup. Codex is intended specifically for agentic coding applications.
Model specifications
- Input
- text
- Output
- text
- Context
- 400,000 tokens
- Max output
- 128,000 tokens
- Input price
- $0.9375 / 1M tokens
- Output price
- $7.5 / 1M tokens
- Released
- 2026-02-11
Capabilities
- Streaming
- Function calling
- Playground
Provider pricing, discounts and data privacy
Compare effective provider prices, published discounts, regions, retention policies, training use, compliance, and privacy links by service tier.
Standard service tier
2 available providers · discounts up to 25% · tier input average $1.09375 / 1M tokens · tier output average $8.75 / 1M tokens
Azure
Tier: Standard · Region: US
Pricing
- Input
- $0.9375 / 1M tokens
- Output
- $7.5 / 1M tokens
Discounts
- Input: 25% off — list $1.25 / 1M tokens, discounted $0.9375 / 1M tokens, effective $0.9375 / 1M tokens
- Output: 25% off — list $10 / 1M tokens, discounted $7.5 / 1M tokens, effective $7.5 / 1M tokens
Data privacy and compliance
- Region
- US
- Zero data retention
- Yes
- Data retention
- Zero retention
- Used for training
- No
- Data collection
- Moderated
- Yes
- GDPR compliant
- Yes
- HIPAA compliant
- Yes
- SOC 2 certified
- Yes
- BYOK supported
- No
Privacy policy · Terms · Official website · Documentation · Status
OpenAI
Tier: Standard · Region: US
Pricing
- Input
- $1.25 / 1M tokens
- Output
- $10 / 1M tokens
No provider discount is currently published.
Data privacy and compliance
- Region
- US
- Zero data retention
- Yes
- Data retention
- Zero retention
- Used for training
- No
- Data collection
- Moderated
- Yes
- GDPR compliant
- Yes
- HIPAA compliant
- Yes
- SOC 2 certified
- Yes
- BYOK supported
- Yes
Privacy policy · Terms · Official website · Documentation · Status
Frequently asked questions
- What is OpenAI: Gpt 5.1 codex?
- GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks. The model supports building projects from scratch, feature development, debugging, large-scale refactoring, and code review. Compared to GPT-5.1, Codex is more steerable, adheres closely to developer instructions, and produces cleaner, higher-quality code outputs. Reasoning effort can be adjusted with the reasoning.effort parameter. Codex integrates into developer environments including the CLI, IDE extensions, GitHub, and cloud tasks. It adapts reasoning effort dynamically—providing fast responses for small tasks while sustaining extended multi-hour runs for large projects. The model is trained to perform structured code reviews, catching critical flaws by reasoning over dependencies and validating behavior against tests. It also supports multimodal inputs such as images or screenshots for UI development and integrates tool use for search, dependency installation, and environment setup. Codex is intended specifically for agentic coding applications.
- How much does OpenAI: Gpt 5.1 codex cost?
- Input costs start at $0.9375 / 1M tokens and output costs start at $7.5 / 1M tokens. Provider-level prices vary by service tier.
- Are provider discounts available for OpenAI: Gpt 5.1 codex?
- Yes. Current provider offers include discounts of up to 25% from list price. The provider table shows list, discounted, and effective prices.
- What is the context length of OpenAI: Gpt 5.1 codex?
- OpenAI: Gpt 5.1 codex supports a 400,000 token context window and up to 128,000 output tokens.
- What capabilities does OpenAI: Gpt 5.1 codex support?
- OpenAI: Gpt 5.1 codex supports Streaming, Function calling, Playground.
- Which providers offer OpenAI: Gpt 5.1 codex?
- OpenAI: Gpt 5.1 codex is available from Azure, OpenAI.
- How do providers handle data privacy for OpenAI: Gpt 5.1 codex?
- 2 of 2 providers report that customer data is not used for training, and 2 offer zero-data-retention routing. Retention, compliance, and privacy-policy links are listed per provider.