All models
Head to head
Claude Fable 5.1 vs Claude Sonnet 5.5
Price, context, inputs and filters. No benchmarks theatre.
Claude Sonnet 5.5 costs 5× less per message.
Both hold the same amount of context.
Fact
Made by
Anthropic
Anthropic
Content tier
Mainstream
Mainstream
Intelligence
Brilliant
Smart & Cheap
Price per message
~30.55 credits≈ 3 messages for $1
~6.11 credits≈ 16 messages for $1
Context window
1M tokens≈ 1,538 pages of text in one go
1M tokens≈ 1,538 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. 1 credit = $0.01.