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 Opus 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 Claude Opus family.
Model details →Side-by-side comparison
| Capability | Free Models Router | Anthropic: Claude Opus Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 200K | 1M | 🏆 Anthropic: Claude Opus Latest |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.00 | $5.00 | 🏆 Free Models Router |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.00 | $25.00 | 🏆 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 Opus 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 Opus Latest?
Input: $0.00 vs $5.00 per 1M tokens. Output: $0.00 vs $25.00 per 1M tokens.
What context windows do Free Models Router and Anthropic: Claude Opus Latest support?
Free Models Router supports up to 200K tokens. Anthropic: Claude Opus Latest supports up to 1M tokens.
Do both Free Models Router and Anthropic: Claude Opus Latest support tool calling?
Free Models Router: yes. Anthropic: Claude Opus 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