GPT-5 Mini
OpenAI released 2025-08-07 proprietary
GPT-5.6 Luna is both better and cheaper.
It scores +26.5 higher and costs 35% less ($0.450/M against $0.688/M) on this workload — and it does everything this model does.
DeepSeek V4 Flash 0731 is cheaper still (85% less) but drops no image, file input.
The same model via batch is 50% cheaper ($0.344/M) — same weights, different latency.
Every price dimension
| Input | $0.250/M |
|---|---|
| Output | $2.00/M |
| Cached input | $0.025/M |
| Web search | $0.01/call |
| Batch discount | 50% |
Independent scores
| Intelligence | 25.8 |
|---|---|
| Coding | 15.6 |
| Agentic | 19.6 |
| LMArena Elo | 1373.4high |
Sources are listed separately rather than averaged. Across the 62 models both have scored they correlate at r = 0.806 — close agreement overall, but four models rank very differently between them, and a blended score would hide exactly those.
Capability
| Context window | 400K |
|---|---|
| Max output | 128K |
| Input modes | text, image, file |
| Tool use | yes |
| Reasoning | always on |
| Knowledge cutoff | 2024-05-31 |
| Open weights | no |
Provenance
| Price source | openrouter.ai |
|---|---|
| Fetched | 2026-08-24 |
| Quality data | verified |
| Cross-checked | vendor page |
GPT-5 Mini is a compact version of GPT-5, designed to handle lighter-weight reasoning tasks. It provides the same instruction-following and safety-tuning benefits as GPT-5, but with reduced latency and cost....