Anthropic
Claude Opus 5.5 Pricing, Specs & Alternatives
Anthropic says it costs 40 percent less to run than Opus 5 on typical workloads. Released Sep 22, 2026.
Latest changes
All changesGet an email when Claude Opus 5.5 changes its price or plans
Questions
How much does Claude Opus 5.5 cost
Claude Opus 5.5 lists $4 per 1M input tokens and $20 per 1M output tokens, checked Nov 9, 2026 on docs.anthropic.com.
When was Claude Opus 5.5 released
Sep 22, 2026, per platform.claude.com.
What is the Claude Opus 5.5 context window
1M tokens, per platform.claude.com, read Nov 9, 2026.
Who makes Claude Opus 5.5
Anthropic.
What are alternatives to Claude Opus 5.5
Claude Fable 5.1, Claude Fable 5.2, Claude Fable 5, Claude Mythos 5.1, Claude Mythos 5.2.
Head to head
All comparisons- GPT-6 Astra vs Claude Opus 5.5: Claude Opus 5.5 $4 / $20 vs GPT-6 Astra $10 / $50 per 1M tokens in / out.
- Gemini 4 Argon vs Claude Opus 5.5: Claude Opus 5.5 $4 / $20 vs Gemini 4 Argon $2 / $10 per 1M tokens in / out.
- Claude Opus 5.5 vs GPT-5.6 Sol: Claude Opus 5.5 $4 / $20 vs GPT-5.6 Sol $4 / $20 per 1M tokens in / out.