All models
Anthropic
Claude Opus 4.5
Anthropic's November 2025 Opus, a top coding and agent model in its day and the first Opus at a much lower price. Excellent at careful writing and complex code, 200K context. Cautious on controversial topics. Claude Opus 5.5 is newer and cheaper.
MainstreamThe big labs' models with their own safety filters. Best for work, code and research.
Brilliant
Intelligence
~15.28 credits
Estimated price per message
200K tokens
Context window
Text, Images
Reads
Claude Opus 4.5 is a legacy model. Its successor, Claude Opus 5.5, is faster or cheaper - and chats that used Claude Opus 4.5 move to it automatically.
See Claude Opus 5.5The facts
Made by
Anthropic
Content tier
MainstreamThe big labs' models with their own safety filters. Best for work, code and research.
Intelligence
Brilliant
Estimated price per message
~15.28 credits≈ 6 messages for 1 €
Context window
200K tokens≈ 308 pages of text in one go
Reads
Text, Images
Writes
Text
Tool use
Yes - search, memory, code and more
Served via
OpenRouter, Unbottled AI
Status
Legacy
A typical message: 16K tokens in, 1.5K out. Short replies cost less. Models served via OpenRouter bill the real provider cost plus our markup, so actual charges vary. 1 credit = 0.01 €.
Compare Claude Opus 4.5
Same facts, side by side.
Try Claude Opus 4.5 now.
No subscription. Free credits to start. The chat opens with Claude Opus 4.5 selected and a prompt ready - just send.