Claude Haiku 4.5 (latest) vs Gemini 3.5 Flash
Side-by-side comparison across metrics, pricing, and overall score — every value traced to a source.
Verdict: Gemini 3.5 Flash ranks highest overall (#7) with a score of 33.1.
The best choice still depends on which metrics matter for your workload — per-metric winners are marked below.
What the numbers hide
Computed from the published values below — no estimates, no generated claims.
Fragile verdict
The overall winner flips to Gemini 3.5 Flash if Context Window is weighted at 40% (it counts for 18% today). If context window drives your decision, the ranking above may not be your ranking.
Fragile verdict
The overall winner flips to Gemini 3.5 Flash if Max Output Tokens is weighted at 35% (it counts for 6% today). If max output tokens drives your decision, the ranking above may not be your ranking.
Real tradeoff
Claude Haiku 4.5 (latest) clearly beats Gemini 3.5 Flash on Input Price but clearly loses on Context Window — this pair is a priorities question, not a quality question.
What nobody reports
SWE-Bench Pro Score (1 of 2 missing) — the questions worth asking vendors directly.
AI hot take
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| Metric | Claude Haiku 4.5 (latest)Anthropic | Gemini 3.5 FlashGoogle |
|---|---|---|
| Overall OptiSift Score | 32.8#9 | 33.1#7 |
| Input Price | $1 | $1.5 |
| Output Price | $5 | $9 |
| Cache Read Price | $0.1 | $0.15 |
| Context Window | 200K | 1.0M |
| Max Output Tokens | 64K | 66K |
| SWE-Bench Pro Score | 39.45% | — |
| Tool Calling | Yes | Yes |
| Extended Reasoning | Yes | Yes |
About these models
#9Claude Haiku 4.5 (latest)
Anthropic
Claude Haiku 4.5 (latest) is Anthropic's reasoning-capable model: $1/$5 per 1M input/output tokens, 200K token context window, 39.45% on SWE-Bench Pro.
#7Gemini 3.5 Flash
Gemini 3.5 Flash is Google's reasoning-capable model: $1.50/$9 per 1M input/output tokens, 1.0M token context window.