Claude Sonnet 5 vs GPT-6 Luna Pro

Price, context window & benchmark comparison

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Claude Sonnet 5

Anthropic
$2.00 / $10.00
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 20.0× cheaper than Claude Sonnet 5 on a typical 3:1 input/output mix. GPT-6 Luna Pro has the larger context window (1.1M vs 1M).
Claude Sonnet 5GPT-6 Luna Pro
Input price / 1M$2.00$0.10
Output price / 1M$10.00$0.50
Blended price (3:1)$4.00$0.20
Cached input / 1M$0.20$0.01
Context window1M1.1M
Max output128K128K
Intelligence index38.2—
Coding index71.5—
Providers106
Best provider uptime (30m)100.0%100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-06-302026-09-22
Retirement——

Cost calculator

FAQ

Which is cheaper, Claude Sonnet 5 or GPT-6 Luna Pro?

GPT-6 Luna Pro is 20.0× cheaper than Claude Sonnet 5 on a typical 3:1 input/output mix.

Claude Sonnet 5 vs GPT-6 Luna Pro: which has a bigger context window?

Claude Sonnet 5: 1,000,000 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 5 ≈ $9,000, GPT-6 Luna Pro ≈ $450.00.

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