All models
Head to head
GPT 5.1 vs GPT-6.1 Sol
Price, context, inputs and filters. No benchmarks theatre.
GPT 5.1 costs 1.3× less per message.
GPT-6.1 Sol holds 2.6× more context.
Made by
OpenAI
OpenAI
Content tier
Mainstream
Mainstream
Intelligence
Smart & Cheap
Brilliant
Estimated price per message
~4.55 credits≈ 21 messages for $1
~6.11 credits≈ 16 messages for $1
Context window
400K tokens≈ 615 pages of text in one go
1.1M tokens≈ 1,615 pages of text in one go
Reads
Text, Images
Text, Images
Writes
Text
Text
Tool use
Yes - search, memory, code and more
Yes - search, memory, code and more
Served via
OpenRouter, Unbottled AI
OpenRouter, Unbottled AI
Status
Legacy
Current
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.