Standard Compute
Model comparison 2026

Claude Haiku 5.5 vs Gemini 3.1 Pro

Claude Haiku 5.5
Anthropic · Budget · Proprietary
$0.22/1M · 1M ctx
Gemini 3.1 Pro
Google · Frontier · Proprietary
$5.00/1M · 1.0M ctx

Community vote

Pick a winner in each dimension. You can change your vote any time.

Output Quality
Correctness and depth of what it produces
Agentic Ability
Tool calls, instruction-following, and multi-step tasks
Speed
Tokens per second and time-to-first-token
Value for money
How much capability you get per dollar
Reliability
Consistent results: fewer refusals, loops and format breaks

Specs and pricing side by side

Spec
Haiku 5.5
Gemini 3.1 Pro
Maker
Anthropic
Google
Blended price / 1M
$0.22
$5.00
Input / output
$0.10 in · $0.50 out / 1M tokens
$2.00 in · $12 out / 1M tokens
Context window
1M
1.0M
Open weights
No
No
Tool use
Yes
Yes
Reasoning
Yes
Yes
Output Quality
9.1
9.2
Agentic Ability
9.0
9.0
Speed
9.6
7.5
Value for money
9.4
8.1
Reliability
9.3
8.8

Pricing and capabilities synced from the OpenRouter catalogue. Scores are editorial (0–10).

Verdict: Haiku 5.5 or Gemini 3.1 Pro?

Updated 2026-10-13

Choose Claude Haiku 5.5 if you want subagents, routing and high-volume steps that stay under 100K tokens per request. Choose Gemini 3.1 Pro if you want huge-context and multimodal work, and Gemini CLI users.

In our editorial scoring, Claude Haiku 5.5 leads in 3 of five dimensions (speed, value for money and reliability), while Gemini 3.1 Pro leads in 1. On price, Claude Haiku 5.5 runs about $0.22 per 1M tokens (blended) and is proprietary; Gemini 3.1 Pro is about $5.00 and proprietary.

Where Haiku 5.5 falls short
  • Prompts over 100K tokens cost 5x, on the whole request
  • New tokenizer counts about 30% more tokens than Haiku 4.5 for the same text
Full Haiku 5.5 breakdown →
Where Gemini 3.1 Pro falls short
  • Tool use a touch behind Claude/GPT on some agents
  • Preview-tier stability varies
Full Gemini 3.1 Pro breakdown →

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