Claude Haiku 5.5 vs Claude Opus 5: Specs & Benchmark Comparison
Claude Haiku 5.5 and Claude Opus 5 both come from Anthropic, Claude Opus 5 was released in July 2026, and Claude Haiku 5.5 followed 3 months later in October 2026.
The two models share 3 published benchmarks. Claude Opus 5 leads on 2 of them, Claude Haiku 5.5 on 1. The widest gaps are on Terminal-Bench 4.0, where Claude Opus 5 scores 51.8% against 39.2%; FrontierCode 1.1, where Claude Opus 5 scores 53.4% against 46.4%. Averaged across everything we track, Claude Haiku 5.5 sits at 57.7% and Claude Opus 5 at 55.0%.
Claude Haiku 5.5 is the cheaper API at $0.10 per million input tokens and $0.50 per million output tokens, roughly 50 times cheaper than Claude Opus 5 at $5 and $25. Both accept a context window of about 1M tokens. Both accept text and images as input.
| Characteristic | Claude Haiku 5.5 | Claude Opus 5 |
|---|---|---|
| Company | Anthropic | Anthropic |
| Release Date | October 7, 2026 | July 24, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 128K | 128K |
| Input Price / 1M | $0.10 | $5.00 |
| Output Price / 1M | $0.50 | $25.00 |
| Average Score | 57.7% | 55.0% |
| Benchmarks | ||
| Terminal-Bench 4.0 | 39.2% | 51.8% |
| FrontierCode 1.1 | 46.4% | 53.4% |
| HealthBench Professional | 64.8% | 59.8% |
Visual Benchmark Comparison
Verdict
Claude Haiku 5.5 leads in 2 out of 4 comparison categories.
Both models show comparable average scores: Claude Haiku 5.5 — 0.6, Claude Opus 5 — 0.5.
Claude Haiku 5.5 is 50.0x cheaper: input $0.10/1M vs $5.00/1M tokens.
Same context size: 1M tokens.
Claude Haiku 5.5 is newer: released 10/7/2026 vs 7/24/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — Claude Haiku 5.5 or Claude Opus 5?
Which model is cheaper — Claude Haiku 5.5 or Claude Opus 5?
Which has a larger context window — Claude Haiku 5.5 or Claude Opus 5?
The Claude Haiku 5.5 and Claude Opus 5 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Haiku 5.5 or Claude Opus 5 page. See also the complete list of AI model comparisons.