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Is Claude Sonnet 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 Sonnet 5 discussions
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What Claude Sonnet 5 costs
- Input
- $2.00 /1M tokens
- Output
- $10.00 /1M tokens
- Cached input
- $0.20 /1M tokens
- Context window
- 1M tokens
- Released
- June 30, 2026
Batch API: 50% off input and output.
| 1,000 chat messages1,500 tokens in, 500 out each | $8.00 |
|---|---|
| Summarize a 50-page PDF30,000 tokens in, 1,000 out | $0.07 |
| One coding-agent task60,000 tokens in, 4,000 out, no caching | $0.16 |
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
All news → · Prices re-checked September 28, 2026.
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Show Claude Sonnet 5's live rating on your blog, README, Notion or forum post. It updates every few minutes and links back here.
Claude Sonnet 5: common questions
How much does Claude Sonnet 5 cost?
Through the Anthropic API, Claude Sonnet 5 costs $2.00 per million input tokens and $10.00 per million output tokens, with cached input at $0.20. That works out to about $8.00 for 1,000 typical chat messages. Prices checked September 28, 2026. The Batch API halves both prices.
Is Claude Sonnet 5 dumber today?
The rating at the top of this page shows how people who used Claude Sonnet 5 today rate it, from Lobotomized to Big brain, and the chart shows the last 30 days next to releases and official incidents. Ratings are opinions, not a benchmark. For outages, check the Anthropic status page.
What is Claude Sonnet 5's context window?
Claude Sonnet 5 accepts up to 1M tokens of input in one request.
When was Claude Sonnet 5 released?
Anthropic released Claude Sonnet 5 on June 30, 2026. See every release and incident on the news page.
What are cheaper alternatives to Claude Sonnet 5?
Among mid-tier models, Gemini 3.8 Flash ($3.00 per 1,000 chats), DeepSeek V4 Pro ($3.96 per 1,000 chats) cost less for a typical chat workload. Compare everything in the cost calculator.