Model comparison
Claude Instant vs Claude Sonnet 5.5
Claude Sonnet 5.5 has enough public results to be ranked (#10); Claude Instant does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in reasoning, where Claude Sonnet 5.5 leads 52.4 to 18.8.
Side by side
| Claude Instant | Claude Sonnet 5.5 | |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Noometry Index | 28.8 | 60.5 |
| Released | 2023-08-09 | 2026-09-28 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1M |
| Max output | — | 128K |
| Input $ / M tokens | — | $2 |
| Output $ / M tokens | — | $10 |
| Results tracked | 7 | 16 |
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Category by category
Coding Not comparable
Claude Instant: —, Claude Sonnet 5.5: 65.5 (#6)
| Benchmark | Claude Instant | Claude Sonnet 5.5 |
|---|---|---|
| FrontierCode | — | 52.1% |
| CursorBench | — | 55.5% |
| LMArena WebDev | — | 1699 |
| FrontierSWE | — | 61.9% |
| SciCode | — | 61% |
| ALE-Bench | — | 1,819 |
| HumanEval+ | 50.6% | — |
Agentic & Tool Use Not comparable
Claude Instant: —, Claude Sonnet 5.5: 44.9 (#14)
| Benchmark | Claude Instant | Claude Sonnet 5.5 |
|---|---|---|
| APEX-Agents | — | 75.5% |
Reasoning Claude Sonnet 5.5 leads
Claude Instant: 18.8, Claude Sonnet 5.5: 52.4 (#29)
| Benchmark | Claude Instant | Claude Sonnet 5.5 |
|---|---|---|
| CritPt | — | 31.4% |
| Mystery Game Puzzles | — | 65% |
| DTBench | 45.8% | — |
| Epoch Capabilities Index | 120.2 | — |
Math Not comparable
Claude Instant: —, Claude Sonnet 5.5: 88.7 (#4)
| Benchmark | Claude Instant | Claude Sonnet 5.5 |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 88.8% |
| FrontierMath Tier 4 | — | 80.5% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| ProofBench | — | 100% |
| GSM8K | 86.7% | — |
Knowledge Not comparable
Claude Instant: —, Claude Sonnet 5.5: 66.0 (#11)
| Benchmark | Claude Instant | Claude Sonnet 5.5 |
|---|---|---|
| GPQA Diamond | — | 95.6% |
| SimpleQA Verified | — | 46.5% |
| ARC (AI2) Challenge | 86.3% | — |
| MMLU | 73.4% | — |
| TriviaQA | 78.9% | — |
Multimodal Not comparable
Claude Instant: —, Claude Sonnet 5.5: 53.2 (#5)
| Benchmark | Claude Instant | Claude Sonnet 5.5 |
|---|---|---|
| Furniture Assembly | — | 75% |
Frequently asked questions
Is Claude Instant better than Claude Sonnet 5.5?
Claude Sonnet 5.5 has enough public results to be ranked (#10); Claude Instant does not yet, so treat this comparison as directional.
How many benchmarks do Claude Instant and Claude Sonnet 5.5 share?
0 benchmarks have published results for both models. Claude Instant has 7 scored results on Noometry and Claude Sonnet 5.5 has 16.