Long-context reasoning

Claude Opus 4 vs o3 Cost

Estimate spend differences between Claude Opus 4 and OpenAI o3 for heavy reasoning workloads.

See sample costs Custom calculator

Anthropic

Claude Opus 4

Provider: Anthropic
Modality: text
Context: 200,000
Input / 1M: $15.00
Output / 1M: $75.00
Cached / 1M: $1.50
Batch discount: 50%

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OpenAI

o3

Provider: OpenAI
Modality: text
Context: 200,000
Input / 1M: $10.00
Output / 1M: $40.00
Cached / 1M: $2.50
Batch discount: 50%

View model page →

Sample workload

Estimated spend on a shared scenario

Catalog rates updated 2026-07-31. Same inputs on both models for an apples-to-apples read.

Claude Opus 4

10k × 2k/500 tokens

$675.00

o3

10k × 2k/500 tokens

$400.00

Lower cost

o3 is lower by $275.00 on this sample workload.

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Approximate static list prices for planning only. Always verify against each provider’s official pricing page before production budgeting.