OpenAI Announced Aug 11, 2026
GPT-5.4 mini
OpenAI's small-tier refresh for high-volume agents, positioned around tool-calling reliability at mini-tier prices across coding, science, and long-context work.
Routable on MiniRouter
Use openai/gpt-5.4-mini via the API →- Context
- 400K
- 128K maximum output per the announcement's spec table
- Reasoning effort
- minimal – high
- Four publisher-described effort levels; medium is the default
- Cached input
- $0.04 / 1M
- Discounted cached-input rate per the pricing table
- Weights
- Not released
- API-only; the announcement includes no weights
Publisher pricing
Pricing below comes from the release announcement and does not represent a MiniRouter route or price.
| Phase | Input / 1M | Output / 1M | Blended / 1M | Effective | Source |
|---|---|---|---|---|---|
| Standard | $0.45 | $1.80 | $0.79 | Aug 11, 2026 – open-ended | OpenAI ↗ |
Publisher-reported benchmarks
Results are grouped by unit. Percentage, Elo, and task-count results never share a scale.
| Benchmark | Reported result | Reported by | As of | Source |
|---|---|---|---|---|
| SWE-Bench Pro | 68.3% | OpenAI | Aug 11, 2026 | Announcement ↗ |
| Terminal Bench 2.1 | 81.7% | OpenAI | Aug 11, 2026 | Announcement ↗ |
| GPQA Diamond | 90.2% | OpenAI | Aug 11, 2026 | Announcement ↗ |
| DeepSWE v1.1 | 62.1% | OpenAI | Aug 11, 2026 | Announcement ↗ |
- — OpenAI reports the benchmark figures; MiniRouter has not reproduced them.
- — Now routable through MiniRouter as openai/gpt-5.4-mini; the model page's live price is authoritative.
What is not independently confirmed
- Every figure on this page is self-reported by the cited publisher. MiniRouter did not run these benchmarks.
- Benchmark harnesses are not standardised. Results sharing a name across vendors have not been confirmed to use identical runs.
- Publisher pricing can change, and introductory phases have stated end dates.
- GPT-5.4 mini is routable through MiniRouter today; live pricing on its model page is authoritative over the publisher figures here.
Related coverage
Other release dossiers and the current MiniRouter catalog.
Sources
- Read at OpenAI ↗
OpenAI announcement
Published Aug 11, 2026
Page revised 2026-08-22. Dates change only when the content changes.