Claude Sonnet 4 vs GPT-6 Luna Pro

Price, context window & benchmark comparison

A

Claude Sonnet 4

Anthropic
$3.00 / $15.00
Input / Output · per 1M tokens
VS
O

GPT-6 Luna Pro

OpenAI
$0.10 / $0.50
Input / Output · per 1M tokens
Compare different models
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Verdict: GPT-6 Luna Pro is 30.0× cheaper than Claude Sonnet 4 on a typical 3:1 input/output mix. GPT-6 Luna Pro has the larger context window (1.1M vs 200K).
Claude Sonnet 4GPT-6 Luna Pro
Input price / 1M$3.00$0.10
Output price / 1M$15.00$0.50
Blended price (3:1)$6.00$0.20
Cached input / 1M$0.30$0.01
Context window200K1.1M
Max output64K128K
Intelligence index——
Coding index37.6—
Providers—6
Best provider uptime (30m)—100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2025-05-222026-09-22
Retirement——

Cost calculator

FAQ

Which is cheaper, Claude Sonnet 4 or GPT-6 Luna Pro?

GPT-6 Luna Pro is 30.0× cheaper than Claude Sonnet 4 on a typical 3:1 input/output mix.

Claude Sonnet 4 vs GPT-6 Luna Pro: which has a bigger context window?

Claude Sonnet 4: 200,000 tokens. GPT-6 Luna Pro: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Sonnet 4 ≈ $13,500, GPT-6 Luna Pro ≈ $450.00.

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