Provider guide
Best Anthropic Models in 2026
Anthropic's Claude lineup is strongest when you need careful reasoning, long context, and agentic coding. Fable 5.1 is Anthropic's current model for demanding reasoning and long-horizon agentic work; Sonnet 5 is the balanced production pick.
| Model | Best for | Input $/M | Context | Coding | Reasoning |
|---|---|---|---|---|---|
| Claude Fable 5.1 | Demanding reasoning | $10 | 1M | 9.9 | 10 |
| Claude Fable 5 | Long-running agents | $10 | 1M | 9.9 | 9.9 |
| Claude Opus 5 | Complex reasoning | $5 | 1M | 9.9 | 9.9 |
| Claude Opus 4.8 | Complex reasoning | $5 | 1M | 9.8 | 9.8 |
| Claude Sonnet 5 | Balanced performance | $2 | 1M | 9.6 | 9.5 |
| Claude Haiku 4.5 | Fast responses | $1 | 200K | 8.9 | 8.8 |
Fast picks
- Claude Fable 5.1 for demanding reasoning, long-horizon agents, complex coding, and knowledge work
- Claude Sonnet 5 for balanced production workloads and cost-efficiency
- Claude Haiku 4.5 for low-latency support, routing, and sub-agent tasks