Model comparison
Claude Sonnet 5.5 vs Gemini 3 Deep Think
Claude Sonnet 5.5 has enough public results to be ranked (#10); Gemini 3 Deep Think does not yet, so treat this comparison as directional.
Last verified . 1 shared benchmarks.
GoogleSummary
- They share 1 benchmark with published results for both. Claude Sonnet 5.5 scores higher in 0 categories and Gemini 3 Deep Think in 1 category; one gap is clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3 Deep Think leads 70.8 to 52.4.
- The biggest single-benchmark swing is CritPt: 31.4% for Claude Sonnet 5.5 and 25.7% for Gemini 3 Deep Think.
Side by side
| Claude Sonnet 5.5 | Gemini 3 Deep Think | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 60.5 | 58.5 |
| Released | 2026-09-28 | 2026-02-12 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 16 | 3 |
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Category by category
Coding Not comparable
Claude Sonnet 5.5: 65.5 (#6), Gemini 3 Deep Think: —
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Deep Think |
|---|---|---|
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1699 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 44.9 (#14), Gemini 3 Deep Think: —
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Deep Think |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Gemini 3 Deep Think leads
Claude Sonnet 5.5: 52.4 (#29), Gemini 3 Deep Think: 70.8 (#11)
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Deep Think |
|---|---|---|
| CritPt | 31.4% | 25.7% |
| ARC-AGI-2 | — | 84.6% |
| ARC-AGI-1 | — | 96% |
| Mystery Game Puzzles | 65% | — |
Math Not comparable
Claude Sonnet 5.5: 88.7 (#4), Gemini 3 Deep Think: —
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Deep Think |
|---|---|---|
| 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), Gemini 3 Deep Think: —
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Deep Think |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
Multimodal Not comparable
Claude Sonnet 5.5: 53.2 (#5), Gemini 3 Deep Think: —
| Benchmark | Claude Sonnet 5.5 | Gemini 3 Deep Think |
|---|---|---|
| Furniture Assembly | 75% | — |
Frequently asked questions
Is Claude Sonnet 5.5 better than Gemini 3 Deep Think?
Claude Sonnet 5.5 has enough public results to be ranked (#10); Gemini 3 Deep Think does not yet, so treat this comparison as directional.
How many benchmarks do Claude Sonnet 5.5 and Gemini 3 Deep Think share?
1 benchmark has published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Gemini 3 Deep Think has 3.