Anthropic
Claude Opus 5.5 Limits
Token limits
| Spec | Value |
|---|---|
| Context window | 1M tokens |
| Max output | 128K tokens |
| Input types | Text, Image |
| Output types | Text |
Rate limits
Start tier, the entry API usage tier. The source page lists higher tiers.
| Tier | RPM | Input TPM | Output TPM |
|---|---|---|---|
| Start | 4,000 | 2,000,000 | 400,000 |
Source: claude.com, read Nov 9, 2026.
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Questions
What is the Claude Opus 5.5 context window
1M tokens, per platform.claude.com, read Nov 9, 2026.
What is the Claude Opus 5.5 max output
128K tokens, per platform.claude.com.
What are the Claude Opus 5.5 rate limits
Start tier, the entry API usage tier. The source page lists higher tiers. RPM 4,000, Input TPM 2,000,000, Output TPM 400,000 at the Start tier, per platform.claude.com.
Source: claude.com, read Nov 9, 2026.