LLM Gateway / Compare
LLM Gateway · compare

Compare the models that matter.

The current OpenAI and Anthropic models side by side: price, context, what each can do, and how fast each one answers on our gateway. Every number has a date. Both models run on one withConflux key, so switching is a one-word change.

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Most comparedper 1M tokens
Claude Sonnet 5.5
Input$2.50
Output$12.50
Context1M
VS
GPT-6.1 Terra
Input$2.50
Output$9.38
Context1.05M
model="gpt-6.1-terra" | "claude-sonnet-5-5"
Your price from our live model list · green = better · one key for both
Most compared

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All pairs

28 pairs, current models only

Older models (GPT-5.x, GPT-4.x, Claude 4.x) have their own guide pages under Models, not a page per pair.

28 pairs
Claude Opus 5.5vsGPT-6.1 Terra
Anthropic vs OpenAI · GPT-6.1 Terra costs less
$5.00 / $2.50 in$25.00 / $9.38 out
Claude Opus 5.5vsGPT-6 Astra
Anthropic vs OpenAI · Claude Opus 5.5 costs less
$5.00 / $25.00 in$25.00 / $93.75 out
Claude Sonnet 5.5vsGPT-6.1 Terra
Anthropic vs OpenAI · GPT-6.1 Terra costs less
$2.50 / $2.50 in$12.50 / $9.38 out
Claude Sonnet 5.5vsGPT-6 Astra
Anthropic vs OpenAI · Claude Sonnet 5.5 costs less
$2.50 / $25.00 in$12.50 / $93.75 out
GPT-6.1 TerravsGPT-6 Astra
OpenAI · GPT-6.1 Terra costs less
$2.50 / $25.00 in$9.38 / $93.75 out
Claude Opus 5.5vsClaude Sonnet 5.5
Anthropic · Claude Sonnet 5.5 costs less
$5.00 / $2.50 in$25.00 / $12.50 out
Claude Opus 5.5vsGPT-6.1 Sol
Anthropic vs OpenAI · GPT-6.1 Sol costs less
$5.00 / $5.00 in$25.00 / $18.75 out
Claude Opus 5.5vsGPT-6 Luna
Anthropic vs OpenAI · GPT-6 Luna costs less
$5.00 / $0.25 in$25.00 / $0.94 out
Claude Haiku 5.5vsGPT-6.1 Terra
Anthropic vs OpenAI · Claude Haiku 5.5 costs less
$0.63 / $2.50 in$3.13 / $9.38 out
Claude Haiku 5.5vsGPT-6 Astra
Anthropic vs OpenAI · Claude Haiku 5.5 costs less
$0.63 / $25.00 in$3.13 / $93.75 out
Claude Sonnet 5.5vsGPT-6.1 Sol
Anthropic vs OpenAI · Claude Sonnet 5.5 costs less
$2.50 / $5.00 in$12.50 / $18.75 out
Claude Sonnet 5.5vsGPT-6 Luna
Anthropic vs OpenAI · GPT-6 Luna costs less
$2.50 / $0.25 in$12.50 / $0.94 out
Claude Fable 5.1vsGPT-6.1 Terra
Anthropic vs OpenAI · GPT-6.1 Terra costs less
$12.50 / $2.50 in$62.50 / $9.38 out
Claude Fable 5.1vsGPT-6 Astra
Anthropic vs OpenAI · Claude Fable 5.1 costs less
$12.50 / $25.00 in$62.50 / $93.75 out
GPT-6.1 SolvsGPT-6.1 Terra
OpenAI · GPT-6.1 Terra costs less
$5.00 / $2.50 in$18.75 / $9.38 out
GPT-6.1 SolvsGPT-6 Astra
OpenAI · GPT-6.1 Sol costs less
$5.00 / $25.00 in$18.75 / $93.75 out
GPT-6.1 TerravsGPT-6 Luna
OpenAI · GPT-6 Luna costs less
$2.50 / $0.25 in$9.38 / $0.94 out
GPT-6 AstravsGPT-6 Luna
OpenAI · GPT-6 Luna costs less
$25.00 / $0.25 in$93.75 / $0.94 out
Claude Haiku 5.5vsClaude Opus 5.5
Anthropic · Claude Haiku 5.5 costs less
$0.63 / $5.00 in$3.13 / $25.00 out
Claude Haiku 5.5vsClaude Sonnet 5.5
Anthropic · Claude Haiku 5.5 costs less
$0.63 / $2.50 in$3.13 / $12.50 out
Claude Fable 5.1vsClaude Opus 5.5
Anthropic · Claude Opus 5.5 costs less
$12.50 / $5.00 in$62.50 / $25.00 out
Claude Fable 5.1vsClaude Sonnet 5.5
Anthropic · Claude Sonnet 5.5 costs less
$12.50 / $2.50 in$62.50 / $12.50 out
Claude Haiku 5.5vsGPT-6.1 Sol
Anthropic vs OpenAI · Claude Haiku 5.5 costs less
$0.63 / $5.00 in$3.13 / $18.75 out
Claude Haiku 5.5vsGPT-6 Luna
Anthropic vs OpenAI · GPT-6 Luna costs less
$0.63 / $0.25 in$3.13 / $0.94 out
Claude Fable 5.1vsGPT-6.1 Sol
Anthropic vs OpenAI · GPT-6.1 Sol costs less
$12.50 / $5.00 in$62.50 / $18.75 out
Claude Fable 5.1vsGPT-6 Luna
Anthropic vs OpenAI · GPT-6 Luna costs less
$12.50 / $0.25 in$62.50 / $0.94 out
GPT-6.1 SolvsGPT-6 Luna
OpenAI · GPT-6 Luna costs less
$5.00 / $0.25 in$18.75 / $0.94 out
Claude Fable 5.1vsClaude Haiku 5.5
Anthropic · Claude Haiku 5.5 costs less
$12.50 / $0.63 in$62.50 / $3.13 out
How to choose

Three questions decide most picks

What does a month cost?

Output tokens usually cost several times more than input. For chat and agents, compare the output price first. Each pair page works it out for three real workloads.

How fast does it answer?

We show the typical and the slow answer time, measured on our gateway from real traffic, not a vendor chart.

Can you switch later?

Yes. On withConflux both providers sit behind one OpenAI-compatible key. Changing the model is one word in your code.

Try both models on one key

Sign up free, add credits or your own OpenAI and Anthropic keys, and call either model by name.

Questions

Compare, answered

Why only 28 pairs?

These are the current models people choose between today. A page for every old pair would be the same table with different names, and would not help anyone pick. Older models have their own guide pages under Models.

Are these your prices or the provider's?

Your price on withConflux: the provider's price plus a small margin. With your own keys you pay the provider directly and €19 a month for the gateway.

Do I need two accounts?

No. One withConflux key calls both OpenAI and Anthropic models through the same endpoint.

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