Capabilities
7-day heat trend
−19.2%Pricing breakdown
Typical 3:1 output-to-input mix, per 1M tokens
Estimated monthly cost by workload
Market position
- Cheaper than 9% of tracked models
- Faster than 8% of tracked models
- Efficiency rank: #1013 of 1105
Best suited for
Code generation, refactoring and review, and developer-tooling workloads with large context.
About gpt-5.1-codex-max
GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
gpt-5.1-codex-max is a Code model from OpenAI (US). HotON.ai tracks it at $1.25 per 1M input tokens and $10.00 per 1M output tokens, with a 400K-token context window, ~124 tokens/sec throughput and 99.7% availability. Its composite efficiency score is 87/100 at an estimated $0.008 per successful task.
Compare gpt-5.1-codex-max
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Frequently asked questions
How much does gpt-5.1-codex-max cost per 1M tokens?+
gpt-5.1-codex-max is tracked at $1.25 per 1M input tokens and $10.00 per 1M output tokens. A typical 3:1 output-to-input workload blends to roughly $7.81 per 1M tokens. Figures are illustrative demo data.
What is gpt-5.1-codex-max best for?+
Code generation, refactoring and review, and developer-tooling workloads with large context.
How fast is gpt-5.1-codex-max?+
gpt-5.1-codex-max delivers about 124 tokens/sec with 99.7% tracked availability, suitable for latency-sensitive, real-time applications.
Is gpt-5.1-codex-max cheaper than other AI models?+
Within the HotON.ai tracked set, gpt-5.1-codex-max is cheaper than 9% of models on input price and ranks #1013 of 1105 by overall efficiency.
Related models
Pricing is real (via the TestKey catalog, updated daily). Quality (Arena Elo) is real where the model is ranked on LMArena. Speed, availability and efficiency are modeled estimates.