Claude Opus 5.5 vs Gemini 3.1 Flash Lite Preview

Price, context window & benchmark comparison

Claude Opus 5.5

Anthropic

$4.00 / $20.00

Input / Output · per 1M tokens

Gemini 3.1 Flash Lite Preview

Google

$0.25 / $1.50

Input / Output · per 1M tokens

Compare different models

Verdict: Gemini 3.1 Flash Lite Preview is 14.2× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix. Claude Opus 5.5 scores higher on the Artificial Analysis Intelligence Index (57.6 vs 15.6). Gemini 3.1 Flash Lite Preview has the larger context window (1M vs 1M).

	Claude Opus 5.5	Gemini 3.1 Flash Lite Preview
Input price / 1M	$4.00	$0.25
Output price / 1M	$20.00	$1.50
Blended price (3:1)	$8.00	$0.56
Cached input / 1M	$0.20	$0.025
Context window	1M	1M
Max output	128K	66K
Intelligence index	57.6	15.6
Coding index	—	34.7
Providers	11	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-09-22	2026-03-03
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, Claude Opus 5.5 or Gemini 3.1 Flash Lite Preview?

Gemini 3.1 Flash Lite Preview is 14.2× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix.

Claude Opus 5.5 vs Gemini 3.1 Flash Lite Preview: which has a bigger context window?

Claude Opus 5.5: 1,000,000 tokens. Gemini 3.1 Flash Lite 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 3.1 Flash Lite Preview ≈ $1,250.

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