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Comparisons

GPT 5.6 Luna vs Claude Sonnet 5

Compare API prices and supported settings.

Chat
OpenAI
GPT 5.6 Luna

$0.18input price per 1M tokens

Chat
Anthropic
Claude Sonnet 5

$0.3input price per 1M tokens

What 10M input tokens cost

These totals multiply the lowest published tariff. Matching billing units do not guarantee the same resolution, quality or output length. Check the selected request price before budgeting.

GPT 5.6 Luna

$1.80

$0.18 input price per 1M tokens

Claude Sonnet 5

$3.00

$0.3 input price per 1M tokens

GPT 5.6 Luna costs $1.20 less per 10M input tokens — 40% cheaper than Claude Sonnet 5. Both are billed from the same prepaid balance, so switching costs nothing.

Side by side

AttributeGPT 5.6 LunaClaude Sonnet 5
TypeChatChat
ProviderOpenAIAnthropic
Starting price$0.18 input price per 1M tokens$0.3 input price per 1M tokens
10M input tokens$1.80$3.00
Price options44
Parameters00
Capabilities——
DetailsView GPT 5.6 Luna →View Claude Sonnet 5 →

Frequently asked questions

Which is cheaper, GPT 5.6 Luna or Claude Sonnet 5?

GPT 5.6 Luna is the cheaper of the two: $0.18 against $0.3 per 1M input tokens. Both are usage-based, so you pay per request with no subscription. These totals multiply the lowest published tariff. Matching billing units do not guarantee the same resolution, quality or output length. Check the selected request price before budgeting.

What do GPT 5.6 Luna and Claude Sonnet 5 cost for 10M input tokens?

10M input tokens cost $1.80 on GPT 5.6 Luna and $3.00 on Claude Sonnet 5 — a difference of $1.20, or 40% less on GPT 5.6 Luna. Both draw on the same prepaid balance. These totals multiply the lowest published tariff. Matching billing units do not guarantee the same resolution, quality or output length. Check the selected request price before budgeting.

What can GPT 5.6 Luna do that Claude Sonnet 5 cannot?

Their published capability labels match. This does not establish identical output quality or behaviour; compare the accepted input values and test the same brief.

Can I switch between GPT 5.6 Luna and Claude Sonnet 5?

Both use the same API Stock API key and prepaid balance. Change the model field, then check the target model’s input schema, supported values and output before sending the request.

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