Claude Opus 5.5 vs Gemini 3 Flash Preview

Price, context window & benchmark comparison

A

Claude Opus 5.5

Anthropic
$4.00 / $20.00
Input / Output · per 1M tokens
VS
G

Gemini 3 Flash Preview

Google
$0.50 / $3.00
Input / Output · per 1M tokens
Compare different models
A
G
Verdict: Gemini 3 Flash Preview is 7.1× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix. Gemini 3 Flash Preview has the larger context window (1M vs 1M).
Claude Opus 5.5Gemini 3 Flash Preview
Input price / 1M$4.00$0.50
Output price / 1M$20.00$3.00
Blended price (3:1)$8.00$1.13
Cached input / 1M$0.20$0.05
Context window1M1M
Max output128K66K
Intelligence index57.6
Coding index
Providers11
Best provider uptime (30m)100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-09-222025-12-17
Retirement

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FAQ

Which is cheaper, Claude Opus 5.5 or Gemini 3 Flash Preview?

Gemini 3 Flash Preview is 7.1× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix.

Claude Opus 5.5 vs Gemini 3 Flash Preview: which has a bigger context window?

Claude Opus 5.5: 1,000,000 tokens. Gemini 3 Flash Preview: 1,048,576 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Opus 5.5 ≈ $18,000, Gemini 3 Flash Preview ≈ $2,500.

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