Model comparison
Claude Haiku 5.5 vs Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 49.5 on the Noometry Index. Claude Haiku 5.5 costs 23× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.
Last verified . 9 shared benchmarks.
GoogleSummary
- They share 9 benchmarks with published results for both. Claude Haiku 5.5 scores higher in 3 categories and Gemini 3.1 Pro Preview in 2 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.1 Pro Preview leads 71.7 to 35.2.
- The biggest single-benchmark swing is SimpleQA Verified: 23.8% for Claude Haiku 5.5 and 73.5% for Gemini 3.1 Pro Preview.
- Claude Haiku 5.5 is cheaper at $0.10 / $0.50 per million input/output tokens, against $2 / $12 for Gemini 3.1 Pro Preview.
- Gemini 3.1 Pro Preview accepts more context: 1.05M tokens versus 1M.
Side by side
| Claude Haiku 5.5 | Gemini 3.1 Pro Preview | |
|---|---|---|
| Provider | Anthropic | |
| Noometry Index | 49.5 | 56.7 |
| Released | 2026-10-07 | 2026-02-19 |
| Weights | Proprietary | Proprietary |
| Context window | 1M | 1.05M |
| Max output | 128K | 66K |
| Input $ / M tokens | $0.10 | $2 |
| Output $ / M tokens | $0.50 | $12 |
| Results tracked | 9 | 71 |
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Category by category
Coding Claude Haiku 5.5 leads
Claude Haiku 5.5: 49.2 (#50), Gemini 3.1 Pro Preview: 42.5 (#99)
| Benchmark | Claude Haiku 5.5 | Gemini 3.1 Pro Preview |
|---|---|---|
| LMArena WebDev | 1587 | 1447 |
| SWE-bench Verified | — | 75.6% |
| DeepSWE | — | 11.7% |
| SciCode | — | 58.9% |
| GSO | — | 22.6% |
| WeirdML | — | 72.1% |
| LMArena Coding | — | 1484 |
| MirrorCode | — | 8.9% |
| ALE-Bench | — | 1,161 |
| AlgoTune | — | 2.02 |
Agentic & Tool Use Not comparable
Claude Haiku 5.5: —, Gemini 3.1 Pro Preview: 37.7 (#34)
| Benchmark | Claude Haiku 5.5 | Gemini 3.1 Pro Preview |
|---|---|---|
| Terminal-Bench | — | 80.2% |
| APEX-Agents | — | 35.3% |
| τ²-bench Banking | — | 26% |
| DeepResearch Bench | — | 47.8% |
| PostTrainBench | — | 22% |
| BALROG | — | 57% |
| ExploitBench | — | 26.1% |
| GBAEval | — | 0.8% |
| GDP.pdf | — | 17% |
| LMArena Search | — | 1211 |
| METR Time Horizons | — | 77% |
| Vending-Bench 2 | — | 3,774 |
Reasoning Gemini 3.1 Pro Preview leads
Claude Haiku 5.5: 35.2 (#69), Gemini 3.1 Pro Preview: 71.7 (#12)
| Benchmark | Claude Haiku 5.5 | Gemini 3.1 Pro Preview |
|---|---|---|
| NYT Connections (extended) | 65.7% | 97.4% |
| Mystery Game Puzzles | 30% | 34% |
| ARC-AGI-2 | — | 77.1% |
| SimpleBench | — | 79.6% |
| ARC-AGI-1 | — | 98% |
| CritPt | — | 17.7% |
| Chess Puzzles | — | 55% |
| EnigmaEval | — | 36.8% |
| Thematic Generalization | — | 79.4% |
| EBR-Bench | — | 14.3% |
| LMArena Hard Prompts | — | 1485 |
| DTBench | — | 97.1% |
| LMCA | — | 53.8% |
| Epoch Capabilities Index | — | 154.77 |
| ForecastBench | — | 59 |
Math Claude Haiku 5.5 leads
Claude Haiku 5.5: 73.6 (#18), Gemini 3.1 Pro Preview: 62.1 (#34)
| Benchmark | Claude Haiku 5.5 | Gemini 3.1 Pro Preview |
|---|---|---|
| FrontierMath (Tiers 1-3) | 75.1% | 59.6% |
| FrontierMath Tier 4 | 46.3% | 26.8% |
| OTIS Mock AIME 2024-2025 | 98.9% | 95.6% |
| MathArena Final-Answer Competitions | — | 86.5% |
| ProofBench | — | 26% |
| LMArena Math | — | 1485 |
| FrontierMath (Feb 2025 set) | — | 36.9% |
| FrontierMath Tier 4 (v1) | — | 16.7% |
Knowledge Gemini 3.1 Pro Preview leads
Claude Haiku 5.5: 50.8 (#70), Gemini 3.1 Pro Preview: 71.8 (#3)
| Benchmark | Claude Haiku 5.5 | Gemini 3.1 Pro Preview |
|---|---|---|
| GPQA Diamond | 89.6% | 94.4% |
| SimpleQA Verified | 23.8% | 73.5% |
| Humanity's Last Exam | — | 46.4% |
| Vectara Hallucination Rate | — | 10.4% |
| LMArena Expert | — | 1485 |
Multimodal Claude Haiku 5.5 leads
Claude Haiku 5.5: 43.7 (#21), Gemini 3.1 Pro Preview: 37.9 (#69)
| Benchmark | Claude Haiku 5.5 | Gemini 3.1 Pro Preview |
|---|---|---|
| Furniture Assembly | 47.5% | 26.7% |
| LMArena Vision | — | 1296 |
| Blueprint-Bench 2 | — | 26.5% |
| LMArena Document | — | 1444 |
Multilingual Not comparable
Claude Haiku 5.5: —, Gemini 3.1 Pro Preview: 57.0 (#12)
| Benchmark | Claude Haiku 5.5 | Gemini 3.1 Pro Preview |
|---|---|---|
| LMArena Non-English | — | 1477 |
| LMArena Chinese | — | 1529 |
| LMArena French | — | 1487 |
| LMArena German | — | 1491 |
| LMArena Japanese | — | 1493 |
| LMArena Korean | — | 1455 |
| LMArena Russian | — | 1498 |
| LMArena Spanish | — | 1479 |
Instruction Following Not comparable
Claude Haiku 5.5: —, Gemini 3.1 Pro Preview: 77.0 (#32)
| Benchmark | Claude Haiku 5.5 | Gemini 3.1 Pro Preview |
|---|---|---|
| LMArena Instruction Following | — | 1466 |
Long Context Not comparable
Claude Haiku 5.5: —, Gemini 3.1 Pro Preview: 47.4 (#18)
| Benchmark | Claude Haiku 5.5 | Gemini 3.1 Pro Preview |
|---|---|---|
| CL-bench | — | 20.8% |
| CL-bench Life | — | 16.9% |
| LMArena Longer Query | — | 1483 |
Writing & Preference Not comparable
Claude Haiku 5.5: —, Gemini 3.1 Pro Preview: 66.1 (#37)
| Benchmark | Claude Haiku 5.5 | Gemini 3.1 Pro Preview |
|---|---|---|
| LMArena Text | — | 1481 |
| LMArena Creative Writing | — | 1482 |
| EQ-Bench Creative Writing | — | 1491 |
| EQ-Bench 4 | — | 1142 |
| LMArena Multi-Turn | — | 1488 |
Frequently asked questions
Is Claude Haiku 5.5 better than Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview is the stronger model overall, scoring 56.7 to 49.5 on the Noometry Index. Claude Haiku 5.5 costs 23× less per token, which makes it the better buy when Gemini 3.1 Pro Preview's lead doesn't matter for your workload.
Which is cheaper, Claude Haiku 5.5 or Gemini 3.1 Pro Preview?
Claude Haiku 5.5 is cheaper. It lists at $0.10 per million input tokens and $0.50 per million output tokens; Gemini 3.1 Pro Preview lists at $2 and $12.
Is Claude Haiku 5.5 or Gemini 3.1 Pro Preview better for coding?
Claude Haiku 5.5 scores higher on coding benchmarks: 49.2 versus 42.5 in the Noometry coding category.
Which has the bigger context window?
Gemini 3.1 Pro Preview does, with 1.05M tokens against 1M.
How many benchmarks do Claude Haiku 5.5 and Gemini 3.1 Pro Preview share?
9 benchmarks have published results for both models. Claude Haiku 5.5 has 9 scored results on Noometry and Gemini 3.1 Pro Preview has 71.