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Pareto 26.9 vs Claude Sonnet 5.5

At a glance

Unbiased's multimodal composite model, blending several underlying checkpoints to reach frontier-level general performance.

262K ctx$2.50/$7.50 per M

Anthropic's Sonnet-class model for well-scoped everyday work, a direct upgrade over Claude Sonnet 5.

1M ctx$2.00/$10.00 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper6%
Reasoning & Knowledge
Graduate Science—Factual Recall—
Math
Competition Math—
Reasoning
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-10-02
Reasoning & Knowledge
Graduate Science95.6%Factual Recall46.5%
Math
Competition Math100.0%
Specs
262K
Context
131K
Max output
Oct 2026
Released
1M
Context
128K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$2.50/M tokens
Output25%$7.50/M tokens
Cache read$0.25/M tokens
Live pricing, shown before you run
Input20%$2.00/M tokens
Output$10.00/M tokens
Cache read60%$0.10/M tokens
Cache write$2.50/M tokens
Web search$0.01/search
Chat with Pareto 26.9Go to model
Chat with Claude Sonnet 5.5Go to model
Frequently Asked Questions: Pareto 26.9 vs Claude Sonnet 5.5▼

Which is better, Pareto 26.9 or Claude Sonnet 5.5?

▼

Both Pareto 26.9 and Claude Sonnet 5.5 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Pareto 26.9 or Claude Sonnet 5.5?

▼

Pareto 26.9 has a lower blended cost. Pareto 26.9: $2.50 input / $7.50 output. Claude Sonnet 5.5: $2.00 input / $10.00 output.

Which has a larger context window, Pareto 26.9 or Claude Sonnet 5.5?

▼

Claude Sonnet 5.5 has a larger context window: Pareto 26.9 supports 262K tokens vs Claude Sonnet 5.5 at 1M tokens.

Do both Pareto 26.9 and Claude Sonnet 5.5 support vision?

▼

Yes, both Pareto 26.9 and Claude Sonnet 5.5 support vision/image input.

What are the key differences between Pareto 26.9 and Claude Sonnet 5.5?

▼

Key differences: only Claude Sonnet 5.5 offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Pareto 26.9 and Claude Sonnet 5.5 for free on idapt.app to see which performs better for your specific needs.

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