📋 AI Changelog

Claude Opus 5.5

✅ Active

First model of the Claude 5.5 family with a 1M context window, always-on adaptive thinking, and lower pricing than Opus 5

Provider list prices

Context Window
1M
Input Price
$4.00/1M
Output Price
$20.00/1M
Released
Sep 22, 2026

Capabilities

textvisionextended-thinkingtool-usecode

Crazyrouter API catalogue

Crazyrouter prices: $4 / $20

Catalogue checked: 2026-10-10T14:22:39+00:00. USD per 1M tokens, default group. The first context tier is shown; long contexts may cost more. This is a gateway catalogue snapshot, not a provider release announcement.

Get API Access →Current API models
curl https://crazyrouter.com/v1/chat/completions \
  -H "Authorization: Bearer $CRAZYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"claude-opus-5-5","messages":[{"role":"user","content":"Hello"}],"max_tokens":64}'

Version History

Sep 22, 2026New Release

Claude Opus 5.5 released with a 1M context window, up to 128K output tokens, always-on adaptive thinking, and a June 2026 knowledge cutoff

Sep 22, 2026Pricing Change

Pricing set at $4.00 per 1M input tokens and $20.00 per 1M output tokens, 20% below Opus 5; cache reads drop to $0.20 per 1M tokens

Sep 22, 2026Update

Breaking changes from Opus 5: thinking can no longer be disabled, forced tool use returns an error, thinking blocks are bound to the model and conversation, and the computer_20251124 tool was removed; default effort changed from high to medium

Sep 22, 2026Update

Anthropic announced Claude Sonnet 5.5 and Claude Haiku 5.5 will follow in the coming weeks