Dumb meter / Anthropic
Is Claude Opus 5.5 dumber today?
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How smart does it feel today?
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| Day | Lobotomized | Dumb | Meh | Solid | Big brain |
|---|
Claude Opus 5.5 board
liveHow is Claude Opus 5.5 behaving for you today? Mention the task and whether it's better or worse than last week.
What Claude Opus 5.5 costs
- Input
- $4.00 /1M tokens
- Output
- $20.00 /1M tokens
- Cached input
- $0.20 /1M tokens
- Context window
- 1M tokens
- Released
- September 22, 2026
Batch API: 50% off input and output.
| 1,000 chat messages1,500 tokens in, 500 out each | $16.00 |
|---|---|
| Summarize a 50-page PDF30,000 tokens in, 1,000 out | $0.14 |
| One coding-agent task60,000 tokens in, 4,000 out, no caching | $0.32 |
Checked September 28, 2026. Official pricing · Status page
Latest from Anthropic
- Claude Opus 5.5 releasedSep 22 · Release
- Claude Fable 5.1 and Mythos 5.1 releasedSep 1 · Release
- Anthropic status: elevated errors on requests to multiple modelsAug 20 · Official incident
- Anthropic status: degraded performance for Claude Opus 5 and Haiku 4.5Aug 19 · Official incident
- Anthropic status: degraded performance for multiple modelsAug 18 · Official incident
Prices re-checked September 28, 2026.