Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and...
Model details →Anthropic: Claude Fable 5 vs OpenAI: GPT-5.6 Terra
OpenAI: GPT-5.6 Terra wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is suited for everyday coding, reasoning, and agentic...
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Fable 5 | OpenAI: GPT-5.6 Terra | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 1.1M | 🏆 OpenAI: GPT-5.6 Terra |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $10.00 | $1.00 | 🏆 OpenAI: GPT-5.6 Terra |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $50.00 | $6.00 | 🏆 OpenAI: GPT-5.6 Terra |
| 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 better than OpenAI: GPT-5.6 Terra?
OpenAI: GPT-5.6 Terra 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 and OpenAI: GPT-5.6 Terra?
Input: $10.00 vs $1.00 per 1M tokens. Output: $50.00 vs $6.00 per 1M tokens.
What context windows do Anthropic: Claude Fable 5 and OpenAI: GPT-5.6 Terra support?
Anthropic: Claude Fable 5 supports up to 1M tokens. OpenAI: GPT-5.6 Terra supports up to 1.1M tokens.
Do both Anthropic: Claude Fable 5 and OpenAI: GPT-5.6 Terra support tool calling?
Anthropic: Claude Fable 5: yes. OpenAI: GPT-5.6 Terra: yes.
Compare Anthropic: Claude Fable 5 with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest