All models
Head to head
Claude Sonnet 5.5 vs Claude Opus 5.5
Price, context, inputs and filters. No benchmarks theatre.
Claude Sonnet 5.5 costs 2× less per message.
Both hold the same amount of context.
Fact
Made by
Anthropic
Anthropic
Content tier
Mainstream
Mainstream
Intelligence
Smart & Cheap
Brilliant
Price per message
~6.11 credits≈ 16 messages for $1
~12.22 credits≈ 8 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
Current
Current
A typical message: 16K tokens in, 1.5K out. Short replies cost less. 1 credit = $0.01.