Fusion turns your prompt into a small multi-model deliberation. A panel of expert models (see below) analyzes your prompt in parallel with web search and web fetch enabled, then a...
Model details →OpenRouter: Fusion vs Anthropic Claude Sonnet Latest
Anthropic Claude Sonnet Latest wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
This model always redirects to the latest model in the Anthropic Claude Sonnet family.
Model details →Side-by-side comparison
| Capability | OpenRouter: Fusion | Anthropic Claude Sonnet Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 1M | Tie |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $-1000000.00 | $2.00 | 🏆 OpenRouter: Fusion |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $-1000000.00 | $10.00 | 🏆 OpenRouter: Fusion |
| Tool / function calling First-class support for emitting structured tool calls. | — | Yes | 🏆 Anthropic Claude Sonnet Latest |
| Vision input Accepts image inputs alongside text. | — | Yes | 🏆 Anthropic Claude Sonnet Latest |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | — | Yes | 🏆 Anthropic Claude Sonnet Latest |
Frequently asked questions
Is OpenRouter: Fusion better than Anthropic Claude Sonnet Latest?
Anthropic Claude Sonnet Latest wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between OpenRouter: Fusion and Anthropic Claude Sonnet Latest?
Input: $-1000000.00 vs $2.00 per 1M tokens. Output: $-1000000.00 vs $10.00 per 1M tokens.
What context windows do OpenRouter: Fusion and Anthropic Claude Sonnet Latest support?
OpenRouter: Fusion supports up to 1M tokens. Anthropic Claude Sonnet Latest supports up to 1M tokens.
Do both OpenRouter: Fusion and Anthropic Claude Sonnet Latest support tool calling?
OpenRouter: Fusion: not advertised. Anthropic Claude Sonnet Latest: yes.
Compare OpenRouter: Fusion with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest