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Claude Haiku 4.5 vs Gemini 3.1 Pro
Anthropic's fastest model meets Google's mid-tier Pro. Haiku is cheaper but Gemini has 5x the context window — which tradeoff matters for your workload?
Pricing data verified: Jun 26, 2026
| Specification | Claude Haiku 4.5 (Anthropic) | Gemini 3.1 Pro (Google) |
|---|---|---|
| Input Price (per 1M tokens) | $1.00 | $2.00 |
| Output Price (per 1M tokens) | $5.00 | $12.00 |
| Context Window | 200K tokens | 1M tokens |
| Tier | Budget | Mid |
| Provider | Anthropic |
Calculate Your Exact Costs
Budget pricing vs 5x context — see the real tradeoff for your usage.
Which Model for Which Use Case?
Chatbots & Virtual Assistants
Fast, cost-effective responses. Haiku 4.5's budget pricing makes it ideal for high-volume chat. Gemini 3.1 Pro's larger context helps with long conversation history.
Text Classification & Extraction
Structured tasks that need speed over nuance. Haiku 4.5 is 50-58% cheaper and excels at these tasks. No need for 1M context here.
Long Document Processing
Processing documents over 200K tokens. Gemini 3.1 Pro's 1M context window handles this; Haiku 4.5's 200K limit means you'd need to chunk inputs.
AI Agents & Autonomous Tasks
Multi-step workflows that are output-heavy. Haiku 4.5's 58% cheaper output pricing makes a significant difference at scale, but Gemini's reasoning may be stronger for complex tasks.
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Frequently Asked Questions
Is Claude Haiku 4.5 cheaper than Gemini 3.1 Pro?
Yes. Claude Haiku 4.5 costs $1/$5 per 1M tokens. Gemini 3.1 Pro costs $2/$12 per 1M tokens. Haiku is 50% cheaper on input and 58% cheaper on output — a significant difference for cost-sensitive workloads.
Which has a larger context window?
Gemini 3.1 Pro has a 1M token context window, while Claude Haiku 4.5 has a 200K token context window. Gemini offers 5x the context — critical if you process very long documents or codebases.
When should I choose Claude Haiku 4.5 over Gemini 3.1 Pro?
Choose Claude Haiku 4.5 when cost is the primary concern and your inputs fit within 200K tokens. It's 50-58% cheaper across the board. Choose Gemini 3.1 Pro when you need the 1M context window or stronger reasoning capabilities.
How do these compare to DeepSeek V4 Pro?
DeepSeek V4 Pro costs $0.435/$0.87 per 1M tokens — cheaper than both with 1M context. However, Claude Haiku 4.5 and Gemini 3.1 Pro offer stronger reasoning and better instruction-following. For pure cost optimization, DeepSeek V4 Pro wins.
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