Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...
Model details →Anthropic: Claude Fable 5.1 (batch) vs Google: Gemini 2.5 Flash (batch)
Google: Gemini 2.5 Flash (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
Gemini 2.5 Flash is Google's state-of-the-art workhorse model, specifically designed for advanced reasoning, coding, mathematics, and scientific tasks. It includes built-in "thinking" capabilities, enabling it to provide responses with grea…
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Fable 5.1 (batch) | Google: Gemini 2.5 Flash (batch) | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 1.0M | 🏆 Google: Gemini 2.5 Flash (batch) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $5.00 | $0.15 | 🏆 Google: Gemini 2.5 Flash (batch) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $25.00 | $1.25 | 🏆 Google: Gemini 2.5 Flash (batch) |
| 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 Anthropic: Claude Fable 5.1 (batch) better than Google: Gemini 2.5 Flash (batch)?
Google: Gemini 2.5 Flash (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Anthropic: Claude Fable 5.1 (batch) and Google: Gemini 2.5 Flash (batch)?
Input: $5.00 vs $0.15 per 1M tokens. Output: $25.00 vs $1.25 per 1M tokens.
What context windows do Anthropic: Claude Fable 5.1 (batch) and Google: Gemini 2.5 Flash (batch) support?
Anthropic: Claude Fable 5.1 (batch) supports up to 1M tokens. Google: Gemini 2.5 Flash (batch) supports up to 1.0M tokens.
Do both Anthropic: Claude Fable 5.1 (batch) and Google: Gemini 2.5 Flash (batch) support tool calling?
Anthropic: Claude Fable 5.1 (batch): yes. Google: Gemini 2.5 Flash (batch): yes.