The simplest way to get free inference. openrouter/free is a router that selects free models at random from the models available on OpenRouter. The router smartly filters for models that...
Model details →Free Models Router vs Anthropic Claude Sonnet Latest
Free Models Router wins on 2 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 | Free Models Router | Anthropic Claude Sonnet Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 200K | 1M | 🏆 Anthropic Claude Sonnet Latest |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.00 | $2.00 | 🏆 Free Models Router |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.00 | $10.00 | 🏆 Free Models Router |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Free Models Router better than Anthropic Claude Sonnet Latest?
Free Models Router wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Free Models Router and Anthropic Claude Sonnet Latest?
Input: $0.00 vs $2.00 per 1M tokens. Output: $0.00 vs $10.00 per 1M tokens.
What context windows do Free Models Router and Anthropic Claude Sonnet Latest support?
Free Models Router supports up to 200K tokens. Anthropic Claude Sonnet Latest supports up to 1M tokens.
Do both Free Models Router and Anthropic Claude Sonnet Latest support tool calling?
Free Models Router: yes. Anthropic Claude Sonnet Latest: yes.
Compare Free Models Router with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest