Claude Opus 5.5 vs GPT-5.6
2026 Stored listed rates & illustrative token-cost comparison
📌 Executive Summary (TL;DR):Under a standard baseline of 1M input + 200K output tokens, listed rates for Claude Opus 5.5 and GPT-5.6 are virtually identical. Engineering teams should prioritize latency percentiles and contextual accuracy.(Price records last updated 2026-10-11 (UTC))
Metric
Claude Opus 5.5 (Anthropic)
GPT-5.6 (OpenAI)
Input listed rate
$4.00 / 1M Tokens
$4.00 / 1M Tokens
Output listed rate
$20.00 / 1M Tokens
$20.00 / 1M Tokens
Cached Input rate
$0.20 / 1M Tokens
$0.40 / 1M Tokens
Context Window
1000K Tokens
1050K Tokens
Modality
llm
llm
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