Model comparison
Claude Sonnet 5.5 vs GPT-6.1 Sol
Claude Sonnet 5.5 has enough public results to be ranked (#10); GPT-6.1 Sol does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in coding, where Claude Sonnet 5.5 leads 65.5 to 51.4.
- Both cost about the same: $2 input and $10 output per million tokens.
- GPT-6.1 Sol accepts more context: 1.05M tokens versus 1M.
Side by side
| Claude Sonnet 5.5 | GPT-6.1 Sol | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 60.5 | 42.1 |
| Released | 2026-09-28 | 2026-09-29 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1.05M |
| Max output | 128K | 128K |
| Input $ / M tokens | $2 | $2 |
| Output $ / M tokens | $10 | $10 |
| Results tracked | 16 | 2 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 65.5 (#6), GPT-6.1 Sol: 51.4
| Benchmark | Claude Sonnet 5.5 | GPT-6.1 Sol |
|---|---|---|
| DeepSWE | — | 75.2% |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1699 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 44.9 (#14), GPT-6.1 Sol: 34.3
| Benchmark | Claude Sonnet 5.5 | GPT-6.1 Sol |
|---|---|---|
| APEX-Agents | 75.5% | — |
| GDP.pdf | — | 32% |
Reasoning Not comparable
Claude Sonnet 5.5: 52.4 (#29), GPT-6.1 Sol: —
| Benchmark | Claude Sonnet 5.5 | GPT-6.1 Sol |
|---|---|---|
| CritPt | 31.4% | — |
| Mystery Game Puzzles | 65% | — |
Math Not comparable
Claude Sonnet 5.5: 88.7 (#4), GPT-6.1 Sol: —
| Benchmark | Claude Sonnet 5.5 | GPT-6.1 Sol |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
Knowledge Not comparable
Claude Sonnet 5.5: 66.0 (#11), GPT-6.1 Sol: —
| Benchmark | Claude Sonnet 5.5 | GPT-6.1 Sol |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
Multimodal Not comparable
Claude Sonnet 5.5: 53.2 (#5), GPT-6.1 Sol: —
| Benchmark | Claude Sonnet 5.5 | GPT-6.1 Sol |
|---|---|---|
| Furniture Assembly | 75% | — |
Frequently asked questions
Is Claude Sonnet 5.5 better than GPT-6.1 Sol?
Claude Sonnet 5.5 has enough public results to be ranked (#10); GPT-6.1 Sol does not yet, so treat this comparison as directional.
Which is cheaper, Claude Sonnet 5.5 or GPT-6.1 Sol?
GPT-6.1 Sol is cheaper. It lists at $2 per million input tokens and $10 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.
Is Claude Sonnet 5.5 or GPT-6.1 Sol better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 51.4 in the Noometry coding category.
Which has the bigger context window?
GPT-6.1 Sol does, with 1.05M tokens against 1M.
How many benchmarks do Claude Sonnet 5.5 and GPT-6.1 Sol share?
0 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and GPT-6.1 Sol has 2.