All models
Head to head
Claude Sonnet 5.5 vs GPT-5.3-Codex
Price, context, inputs and filters. No benchmarks theatre.
Both cost about the same per message.
Claude Sonnet 5.5 holds 2.5× more context.
Fact
Made by
Anthropic
OpenAI
Content tier
Mainstream
Mainstream
Intelligence
Smart & Cheap
Brilliant
Estimated price per message
~6.11 credits≈ 16 messages for 1 €
~6.37 credits≈ 15 messages for 1 €
Context window
1M tokens≈ 1,538 pages of text in one go
400K tokens≈ 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
Current
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 €.