GPT-5.1
OpenAI released 2025-11-13
Grok 4.6 is both better and cheaper.
It scores +23.4 higher and costs 13% less ($3.00/M against $3.44/M) on this workload — and it does everything this model does.
Gemini 3.7 Flash is cheaper still (78% less) but drops 128K → 66K max output.
The same model via batch is 50% cheaper ($1.72/M) — same weights, different latency.
Every price dimension
| Input | $1.25/M |
|---|---|
| Output | $10.00/M |
| Cached input | $0.125/M |
| Web search | $0.01/call |
Independent scores
| Intelligence | 37.5 |
|---|---|
| Coding | 49.4 |
| Agentic | 21.6 |
| LMArena Elo | 1441.4high |
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 | image, text, file |
| Tool use | yes |
| Reasoning | optional |
Provenance
| Price source | openrouter.ai |
|---|---|
| Fetched | 2026-08-24 |
| Quality data | verified |
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...