GPT-5.1-Codex-Max pricing & price history
GPT-5.1-Codex-Max by OpenAI costs $1.25 per 1M input tokens and $10.00 per 1M output tokens, with a 400K token context window.
Price history
No price changes since tracking began on 2026-09-24. We check every 10 minutes.
Cost calculator
Cheaper alternatives to GPT-5.1-Codex-Max
| Model | Input | Output | Context | Intel. | |
|---|---|---|---|---|---|
 GLM 5.3 Flash Z.ai (Zhipu) | $0.0399 | $0.0784 | 1M | 27.8 | compare |
 DeepSeek V4.1 Flash DeepSeek | $0.022 | $0.40 | 1M | — | compare |
DeepSeek V4.1 Flash 1017 DeepSeek | $0.098 | $0.29 | 1M | 28.6 | compare |
 Llama 4 Scout Meta Llama | $0.10 | $0.30 | 1.3M | — | compare |
 MiMo-V2.6-Flash Xiaomi | $0.14 | $0.28 | 1.1M | 26.7 | compare |
Llama Guard 4 12B Meta Llama | $0.18 | $0.18 | 164K | — | compare |
 Claude Haiku 5.5 Anthropic | $0.10 | $0.50 | 1M | 36.5 | compare |
GPT-6 Luna Pro OpenAI | $0.10 | $0.50 | 1.1M | — | compare |
Using a relay or third-party API?
Check for free whether it really serves GPT-5.1-Codex-Max: output fingerprint, tokenizer and billing evidence, results in 1–3 minutes.
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...
FAQ
How much does GPT-5.1-Codex-Max cost?
GPT-5.1-Codex-Max by OpenAI costs $1.25 per 1M input tokens and $10.00 per 1M output tokens, with a 400K token context window. A typical request with 2,000 input and 500 output tokens costs about $0.0075.
What is the context window of GPT-5.1-Codex-Max?
GPT-5.1-Codex-Max supports up to 400,000 tokens of context and up to 128,000 output tokens per request.
Has GPT-5.1-Codex-Max’s price changed?
No price changes recorded since ModelBank started tracking it on 2026-09-24.
Is GPT-5.1-Codex-Max being deprecated?
No retirement date has been announced for GPT-5.1-Codex-Max as of 2026-11-12.
What are cheaper alternatives to GPT-5.1-Codex-Max?
Cheaper options include GLM 5.3 Flash ($0.0399/$0.0784), DeepSeek V4.1 Flash ($0.022/$0.40), DeepSeek V4.1 Flash 1017 ($0.098/$0.29), Llama 4 Scout ($0.10/$0.30).