GPT-5.1 Codex Max pricing
GPT-5.1 Codex Max is a premium-tier LLM from OpenAI. Here's the full token-price breakdown and what it actually costs per month at real coding workloads.
Token pricing
| Input tokens | $5 / 1M tokens |
| Output tokens | $25 / 1M tokens |
| Cached input | $0.50 / 1M tokens |
| Price tier | Premium |
What it costs per month
Estimated API cost at three typical AI-coding workloads (caching off — real bills are usually lower):
| Workload | Volume | Est. cost |
|---|---|---|
| Light (hobby) | 2M in / 0.5M out | $22.5/mo |
| Daily driver | 15M in / 4M out | $175/mo |
| Heavy / agentic | 80M in / 20M out | $900/mo |
Estimates assume the listed output price. Prompt caching ($0.50/1M) can cut input cost substantially on repeated context.
Cheaper alternatives
- Llama 3 (Ollama/Groq) — $0/1M input (28% SWE-bench)
- Qwen 3 (235B) — $0/1M input (53% SWE-bench)
- Qwen 3.6 — $0/1M input (57% SWE-bench)
Pair GPT-5.1 Codex Max with the right tools — Flowpicker flags model/IDE compatibility before you spend.
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