Model comparison
GPT-5.1-Codex-mini vs GPT-6.1 Sol
Neither GPT-5.1-Codex-mini nor GPT-6.1 Sol has enough public benchmark results to be ranked yet; the rows below show what has been published.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in coding, where GPT-6.1 Sol leads 51.4 to 31.4.
- GPT-5.1-Codex-mini is cheaper at $0.25 / $2 per million input/output tokens, against $2 / $10 for GPT-6.1 Sol.
- GPT-6.1 Sol accepts more context: 1.05M tokens versus 400K.
Side by side
| GPT-5.1-Codex-mini | GPT-6.1 Sol | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 36.9 | 42.1 |
| Released | 2025-11-12 | 2026-09-29 |
| Weights | Proprietary | Proprietary |
| Context window | 400K | 1.05M |
| Max output | 128K | 128K |
| Input $ / M tokens | $0.25 | $2 |
| Output $ / M tokens | $2 | $10 |
| Results tracked | 2 | 2 |
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Category by category
Coding GPT-6.1 Sol leads
GPT-5.1-Codex-mini: 31.4, GPT-6.1 Sol: 51.4
| Benchmark | GPT-5.1-Codex-mini | GPT-6.1 Sol |
|---|---|---|
| DeepSWE | — | 75.2% |
| LMArena WebDev | 1244 | — |
Agentic & Tool Use GPT-5.1-Codex-mini leads
GPT-5.1-Codex-mini: 38.3, GPT-6.1 Sol: 34.3
| Benchmark | GPT-5.1-Codex-mini | GPT-6.1 Sol |
|---|---|---|
| Terminal-Bench | 61.6% | — |
| GDP.pdf | — | 32% |
Frequently asked questions
Is GPT-5.1-Codex-mini better than GPT-6.1 Sol?
Neither GPT-5.1-Codex-mini nor GPT-6.1 Sol has enough public benchmark results to be ranked yet; the rows below show what has been published.
Which is cheaper, GPT-5.1-Codex-mini or GPT-6.1 Sol?
GPT-5.1-Codex-mini is cheaper. It lists at $0.25 per million input tokens and $2 per million output tokens; GPT-6.1 Sol lists at $2 and $10.
Is GPT-5.1-Codex-mini or GPT-6.1 Sol better for coding?
GPT-6.1 Sol scores higher on coding benchmarks: 51.4 versus 31.4 in the Noometry coding category.
Which has the bigger context window?
GPT-6.1 Sol does, with 1.05M tokens against 400K.
How many benchmarks do GPT-5.1-Codex-mini and GPT-6.1 Sol share?
0 benchmarks have published results for both models. GPT-5.1-Codex-mini has 2 scored results on Noometry and GPT-6.1 Sol has 2.