Claude Sonnet 4.6 vs GPT-6 Luna

Price, context window & benchmark comparison

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Claude Sonnet 4.6

Anthropic
$3.00 / $15.00
Input / Output · per 1M tokens
VS
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GPT-6 Luna

OpenAI
$0.10 / $0.50
Input / Output · per 1M tokens
Compare different models
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Verdict: GPT-6 Luna is 30.0× cheaper than Claude Sonnet 4.6 on a typical 3:1 input/output mix. GPT-6 Luna scores higher on the Artificial Analysis Intelligence Index (37.3 vs 30.1). GPT-6 Luna has the larger context window (1.1M vs 1M).
Claude Sonnet 4.6GPT-6 Luna
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 window1M1.1M
Max output128K128K
Intelligence index30.137.3
Coding index63
Providers7
Best provider uptime (30m)100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-02-172026-09-22
Retirement

Cost calculator

FAQ

Which is cheaper, Claude Sonnet 4.6 or GPT-6 Luna?

GPT-6 Luna is 30.0× cheaper than Claude Sonnet 4.6 on a typical 3:1 input/output mix.

Claude Sonnet 4.6 vs GPT-6 Luna: which has a bigger context window?

Claude Sonnet 4.6: 1,000,000 tokens. GPT-6 Luna: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Sonnet 4.6 ≈ $13,500, GPT-6 Luna ≈ $450.00.

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