All models
OpenAI
GPT 5.1
OpenAI's November 2025 update to GPT-5, with adaptive reasoning that thinks longer only on hard questions and a warmer conversational tone. Still a sensible general model with 400K context and image input. GPT-6.1 Sol is newer and sharper for slightly more per message.
MainstreamThe big labs' models with their own safety filters. Best for work, code and research.
Smart & Cheap
Intelligence
~4.55 credits
Estimated price per message
400K tokens
Context window
Text, Images
Reads
GPT 5.1 is a legacy model. Its successor, GPT-6.1 Sol, is faster or cheaper - and chats that used GPT 5.1 move to it automatically.
See GPT-6.1 SolThe facts
Made by
OpenAI
Content tier
MainstreamThe big labs' models with their own safety filters. Best for work, code and research.
Intelligence
Smart & Cheap
Estimated price per message
~4.55 credits≈ 21 messages for 1 €
Context window
400K tokens≈ 615 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 GPT 5.1
Same facts, side by side.
Try GPT 5.1 now.
No subscription. Free credits to start. The chat opens with GPT 5.1 selected and a prompt ready - just send.