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GPT-4o vs Claude Sonnet 4.6: price comparison

Real 2026 API prices side by side, with the total cost of a typical 10M-input / 3M-output monthly workload.

Price & cost at a glance

	GPT-4o	Claude Sonnet 4.6
Input / 1M tokens	$2.5	$3
Output / 1M tokens	$10	$15
Context window	128K	300K
Cost — 10M in + 3M out	$55	$75

Green = cheaper / larger. Prices per 1M tokens, USD. Snapshot 2026 — verify with the provider.

Which is cheaper?

GPT-4o is the cheaper option on a 10M-in / 3M-out workload — about $55/mo versus $75 for Claude Sonnet 4.6 (~1.4× difference). Because output tokens are billed higher, the model with the lower output price usually wins as your responses get longer.

Run your own token mix in the cost calculator, or see each model in depth: GPT-4o · Claude Sonnet 4.6.

Frequently asked

Is GPT-4o or Claude Sonnet 4.6 cheaper?

At a typical 10M input + 3M output tokens per month, GPT-4o costs about $55 versus $75 for Claude Sonnet 4.6 — GPT-4o is roughly 1.4x cheaper on this workload. Your ratio of input to output tokens changes the gap.

What's the price difference between GPT-4o and Claude Sonnet 4.6?

GPT-4o is $2.5/$10 per 1M input/output tokens; Claude Sonnet 4.6 is $3/$15. Output tokens usually dominate a bill, so compare the output price first.

Which has the bigger context window, GPT-4o or Claude Sonnet 4.6?

GPT-4o supports about 128K tokens and Claude Sonnet 4.6 about 300K. A bigger window costs more per call because every token in context is billed.

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Educational estimates — not affiliated with any provider.