Side-by-side comparison of pricing, context window, benchmarks, capabilities, and license. Data sourced from the Interestana AI Index, kept current as developers update their models.
Model A — Anthropic
Claude 4.5 Sonnet is Anthropic’s state-of-the-art coding and tool-use model, leading the SWE-bench coding benchmark and powering Claude Code, Claude.ai, and Claude in the Anthropic API.
Model B — Anthropic
Claude 4.5 Haiku is Anthropic’s fastest and cheapest production model, targeting real-time use cases without sacrificing instruction-following quality.
| Property | Claude 4.5 Sonnet | Claude 4.5 Haiku |
|---|---|---|
| Released | May 8, 2026 | Mar 4, 2026 |
| Developer | Anthropic | Anthropic |
| Type | multimodal | multimodal |
| License | proprietary | proprietary |
| Context window | 1,000,000 | 200,000 |
| Parameters | — | — |
| Input $/M tokens | $3.00 | $0.80 |
| Output $/M tokens | $15.00 | $4.00 |
Bold green values indicate the winner on that dimension where comparison is meaningful (lower price wins; bigger context wins; more open license wins; newer date wins).
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Programmatic access available at /api/ai/compare?a=claude-4-5-sonnet&b=claude-4-haiku. CORS is open. Citation guidance: /about/editorial-process.