All models
Head to head
GPT-5 Pro vs Claude Opus 5.5
Price, context, inputs and filters. No benchmarks theatre.
Claude Opus 5.5 costs 4.5× less per message.
Claude Opus 5.5 holds 2.5× more context.
Fact
Made by
OpenAI
Anthropic
Content tier
Mainstream
Mainstream
Intelligence
Smart & Cheap
Brilliant
Estimated price per message
~54.6 credits≈ 1 messages for $1
~12.22 credits≈ 8 messages for $1
Context window
400K tokens≈ 615 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. Models served via OpenRouter bill the real provider cost plus our markup, so actual charges vary. 1 credit = $0.01.