Gemini 3 Pro vs Claude Haiku 4.5 for legal writing: which is better in 2026?
A head-to-head look at Gemini 3 Pro and Claude Haiku 4.5 for legal writing. Benchmarks via artificialanalysis.ai, pricing as of May 2026. Compare AI models like these inside Admix.
Quick verdict
For legal writing in May 2026, Gemini 3 Pro edges out Claude Haiku 4.5 on the contextWindow metric. Largest context for ingesting full case files at once.
Side-by-side specs
| Spec | Gemini | Haiku |
|---|---|---|
| Intelligence index | 75.6 | 65.8 |
| Coding index | 73.4 | 66.2 |
| Context window | 2M tokens | 500K tokens |
| Speed (tok/s) | 165 | 205 |
| Input $/M | $2.50 | $0.80 |
| Output $/M | $10.00 | $4.00 |
| Released | Feb 12, 2026 | Mar 19, 2026 |
How they handle legal writing
Gemini 3 Pro: Largest context for ingesting full case files at once.
Claude Haiku 4.5: Cheap Claude quality for everyday tasks. The main caveat is not as strong as opus on agentic coding.
Cost per 1,000 queries
Assuming 1,500 input and 800 output tokens per query:
- Gemini 3 Pro: $11.75 per 1,000 queries
- Claude Haiku 4.5: $4.40 per 1,000 queries
Verdict by sub-task
- Best raw quality on legal writing:
- Best price: Claude Haiku 4.5
- Longest context: Gemini 3 Pro
- Fastest: Claude Haiku 4.5
FAQ
Is Gemini 3 Pro better than Claude Haiku 4.5 for legal writing?
On May 2026 benchmarks (artificialanalysis.ai), Gemini 3 Pro ranks higher than Claude Haiku 4.5 for legal writing on the contextWindow metric. The gap is small enough that the choice often comes down to price, context length, and tone.
Which is cheaper, Gemini 3 Pro or Claude Haiku 4.5?
Gemini 3 Pro costs $2.50 input and $10.00 output per million tokens. Claude Haiku 4.5 costs $0.80 input and $4.00 output per million tokens.
Can I use both Gemini and Haiku in one app?
Yes. Admix is a multi model AI chat aggregator that lets you run Gemini 3 Pro and Claude Haiku 4.5 side by side under one subscription.
Sources
Benchmarks from artificialanalysis.ai (May 2026).
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