OpenAICodex Mini
Codex Mini is an OpenAI proprietary reasoning model, released 23 May 2025. It is not yet ranked: 2 independent results so far, and the index needs at least five across two categories. At $2.63 per million tokens blended it is pricier than most ranked models. Last measured 23 May 2025.stale: no new result in six months
- Blended price
- $2.63/M
- $1.50 in · $6.00 out
- Output speed
- –
- First answer
- –
- Context
- 200k
- Full answer
- –
- Cost per run
- –
- Released
- 23 May 2025
- Reasoning33
Benchmark results
See all LLM benchmarks. One column per reasoning effort. Rank is among every configuration of every model on that benchmark. Hover a score for the run it came from.
What a task costs
Estimates from list price, output speed and time to first answer for the best configuration. “With caching” assumes three-quarters of the input is served from the prompt cache at $0.375 per 1M. Reasoning tokens are not modelled.
| Workload | Tokens in / out | Cost | With caching | Time |
|---|---|---|---|---|
| Chat reply | 400 / 300 | $0.0024 | $0.0021 | – |
| Summarize a 30-page report | 12,000 / 600 | $0.022 | $0.011 | – |
| Code edit | 6,000 / 1,500 | $0.018 | $0.013 | – |
| Agentic coding session | 60,000 / 4,000 | $0.114 | $0.063 | – |
| Structured extraction | 2,000 / 200 | $0.0042 | $0.0025 | – |
More from OpenAI
See also
Questions people ask
- Why does Codex Mini have no BenchLeader Index score?
- The index needs at least five independent results across at least two categories; as of 25 Oct 2026 Codex Mini has 2 that count. Launch-post scores are never used, so it is ranked once independent publishers have measured it.
- How much does Codex Mini cost per 1M tokens?
- As of 25 Oct 2026, Codex Mini costs $1.50 per 1M input tokens and $6.00 per 1M output tokens, $2.63 blended (three input tokens per output token).
- When was Codex Mini released?
- OpenAI released Codex Mini on 23 May 2025.
Data as of 25 Oct 2026. Compare with another model.
Cite as: BenchLeader, “Codex Mini: benchmarks, pricing, speed and rank”, data as of 25 Oct 2026, https://www.benchleader.com/models/codex-mini.