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Comparisons

Claude Sonnet 5.5 vs GPT 6.1 Sol

Side-by-side pricing and capabilities on the API Stock API — one key, one prepaid balance.

Chat
Anthropic
Claude Sonnet 5.5

$0.9input price per 1M tokens

Chat
OpenAI
GPT 6.1 Sol

$2.4input price per 1M tokens

What 10M input tokens cost

Claude Sonnet 5.5

$9.00

$0.9 input price per 1M tokens

GPT 6.1 Sol

$24.00

$2.4 input price per 1M tokens

Claude Sonnet 5.5 costs $15.00 less per 10M input tokens — 63% cheaper than GPT 6.1 Sol. Both are billed from the same prepaid balance, so switching costs nothing.

Side by side

AttributeClaude Sonnet 5.5GPT 6.1 Sol
TypeChatChat
ProviderAnthropicOpenAI
Starting price$0.9 input price per 1M tokens$2.4 input price per 1M tokens
10M input tokens$9.00$24.00
Price options44
Parameters00
Capabilities——
DetailsView Claude Sonnet 5.5 →View GPT 6.1 Sol →

Frequently asked questions

Which is cheaper, Claude Sonnet 5.5 or GPT 6.1 Sol?

Claude Sonnet 5.5 is the cheaper of the two: $0.9 against $2.4 per 1M input tokens. Both are usage-based, so you pay per request with no subscription and no minimum.

What do Claude Sonnet 5.5 and GPT 6.1 Sol cost for 10M input tokens?

10M input tokens cost $9.00 on Claude Sonnet 5.5 and $24.00 on GPT 6.1 Sol — a difference of $15.00, or 63% less on Claude Sonnet 5.5. Both draw on the same prepaid balance.

What can Claude Sonnet 5.5 do that GPT 6.1 Sol cannot?

Their published capabilities match, so the practical differences between Claude Sonnet 5.5 and GPT 6.1 Sol are price and the parameters each accepts.

Can I switch between Claude Sonnet 5.5 and GPT 6.1 Sol?

Yes. Both run behind the same API Stock endpoint, so switching means changing the model field in the request body. The same API key and the same prepaid balance cover both, and there is nothing else to migrate.

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