Model comparison
Claude Haiku 4.5 vs Gemini 3 Flash
Head-to-head evidence from 4 shared benchmark results across 3 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Haiku 4.5 #77 (Estimated); Gemini 3 Flash #49 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Haiku 4.5 and Gemini 3 Flash share 4 comparable benchmark results. 1 of 8 categories are comparable. 1 result is unique to Claude Haiku 4.5; 15 to Gemini 3 Flash.
Updated July 20, 2026- Shared results
- 4
- Claude Haiku 4.5 only
- 1
- Gemini 3 Flash only
- 15
- Comparable categories
- 1 / 8
Pick Gemini 3 Flash if you want the stronger benchmark profile. Claude Haiku 4.5 only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Confidence note. This is a partial-evidence comparison with 4 shared benchmark results across 3 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Gemini 3 Flash is clearly ahead on the BenchAlign aggregate, 60.49 to 56.58. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Gemini 3 Flash's sharpest advantage is in mathematics, where it averages 27.8 against 4.9. The single biggest benchmark swing on the page is FrontierMath v2 (Tiers 1-3), 5.903% to 35.640%.
Claude Haiku 4.5 is also the more expensive model on tokens at $1.00 input / $5.00 output per 1M tokens, versus $0.50 input / $3.00 output per 1M tokens for Gemini 3 Flash. Gemini 3 Flash gives you the larger context window at 1M, compared with 200K for Claude Haiku 4.5.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude Haiku 4.5 | Δ | Gemini 3 Flash |
|---|---|---|---|
| Math | Claude Haiku 4.54.9 | Margin→ 22.9 | Gemini 3 Flash27.8 |
| Coding | Claude Haiku 4.573.3 | MarginNo overlap | Gemini 3 FlashNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
FrontierMath v2 (Tiers 1-3)
MathA 5.903%B 35.640%Winner: Gemini 3 FlashΔ 29.7FrontierMath v2 (Tiers 1-3): Claude Haiku 4.5 scored 5.903%; Gemini 3 Flash scored 35.640%. Gemini 3 Flash wins this benchmark. - Source ↗
FrontierMath v2 (Tier 4)
MathA 2.083%B 4.167%Winner: Gemini 3 FlashΔ 2.1FrontierMath v2 (Tier 4): Claude Haiku 4.5 scored 2.083%; Gemini 3 Flash scored 4.167%. Gemini 3 Flash wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Haiku 4.5 | Gemini 3 Flash | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Haiku 4.5$1 input / $5 output | Gemini 3 Flash$0.5 input / $3 output | Gemini 3 Flash has the lower combined listed price. |
| Generation speedtokens per second | Claude Haiku 4.5Not available | Gemini 3 Flash159 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Haiku 4.5Not available | Gemini 3 Flash1.19 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Haiku 4.5200K | Gemini 3 Flash1M | Gemini 3 Flash lists the larger context window. |
Benchmark Deep Dive
Agentic4 benchmarks
Coding3 benchmarks
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Claude Haiku 4.5 | Gemini 3 Flash | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | — | 27.4% | Not comparable |
| AA-GPQA DiamondSource | — | 81.2% | Not comparable |
| AA-HLESource | — | 14.1% | Not comparable |
| AA-Omniscience IndexSource | — | -3.6% | Not comparable |
| AA-Omniscience AccuracySource | — | 45.5% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 90.2% | Not comparable |
MathGemini 3 Flash wins2 benchmarks
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude Haiku 4.5 | Gemini 3 Flash | Result |
|---|---|---|---|
| AA-IFBenchSource | — | 55.1% | Not comparable |
Frequently Asked Questions (2)
Which is better, Claude Haiku 4.5 or Gemini 3 Flash?
Gemini 3 Flash is ahead on BenchLM's BenchAlign leaderboard, 60.49 to 56.58. The biggest single separator in this matchup is FrontierMath v2 (Tiers 1-3), where the scores are 5.903% and 35.640%.
Which is better for math, Claude Haiku 4.5 or Gemini 3 Flash?
Gemini 3 Flash has the edge for math in this comparison, averaging 27.8 versus 4.9. Inside this category, FrontierMath v2 (Tiers 1-3) is the benchmark that creates the most daylight between them.
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