Claude Haiku 5.5 vs Claude Opus 5.5: pricing and benchmarks
Claude Haiku 5.5 is 98% cheaper on input tokens ($0.10 vs $4.00 per 1M). Claude Haiku 5.5 is 98% cheaper on output tokens ($0.50 vs $20.00 per 1M). On our document Q&A workload (50,000 questions a month), Claude Haiku 5.5 costs $55.00 a month versus $2,200 for Claude Opus 5.5, 98% less. Claude Opus 5.5 scores 166.8 on the Epoch Capabilities Index vs 159.0 for Claude Haiku 5.5.
Prices verified October 17, 2026.
Which should you choose?
Claude Opus 5.5 scores 166.8 on the Epoch Capabilities Index vs 159.0 for Claude Haiku 5.5.
Claude Opus 5.5 scores 91.2% on FrontierMath (Tiers 1–3) vs 75.1% for Claude Haiku 5.5.
Claude Haiku 5.5 costs $0.20 per 1M tokens (3:1 input-to-output mix) vs $8.00 for Claude Opus 5.5, 98% less.
A trade-off: Claude Opus 5.5 is 7.8 ECI points more capable but costs 40.0x as much as Claude Haiku 5.5.
Pricing and specs
| Claude Haiku 5.5 | Claude Opus 5.5 | |
|---|---|---|
| Provider | Anthropic | Anthropic |
| API model ID | claude-haiku-5-5 | claude-opus-5-5 |
| Input / 1M tokens | $0.10 | $4.00 |
| Cached input / 1M tokens | $0.01 | $0.20 |
| Output / 1M tokens | $0.50 | $20.00 |
| Long-context rates | $0.50 in / $2.50 out above 100K prompt tokens | — |
| Context window | 1M tokens | 1M tokens |
| Max output | 128K tokens | 128K tokens |
| Batch discount | 50% off | 50% off |
Benchmarks
| Claude Haiku 5.5 | Claude Opus 5.5 | |
|---|---|---|
| Epoch Capabilities Index | 159.0 | 166.8 |
| GPQA Diamond· Science reasoning | 89.6% | 90.6% |
| FrontierMath (Tiers 1–3)· Advanced math | 75.1% | 91.2% |
| SimpleQA Verified· Factual accuracy | 23.8% | 72.2% |
| ARC-AGI-2· Abstract reasoning | — | 93.3% |
| DeepSWE· Coding | — | — |
| APEX-Agents· Agentic work | 56.1% | 73.5% |
Source: Epoch AI, best recorded result per model (CC BY 4.0). A dash means no published score. See all benchmarks
Monthly cost for real workloads
| Workload | Claude Haiku 5.5 | Claude Opus 5.5 | Difference |
|---|---|---|---|
Support chatbot 100,000 replies a month, ~1,500 input tokens (system prompt + history) and ~400 output tokens each. | $35.00 | $1,400 | Claude Haiku 5.5 98% cheaper |
Document Q&A (RAG) 50,000 questions a month with ~8,000 tokens of retrieved context and ~600 output tokens each. | $55.00 | $2,200 | Claude Haiku 5.5 98% cheaper |
Coding agent 10,000 agent steps a month, ~40,000 input tokens each (70% read from the prompt cache) and ~2,000 output tokens. | $24.80 | $936.00 | Claude Haiku 5.5 97% cheaper |
Estimates use standard list prices and ignore cache-write surcharges. Different tokenizers can count the same text differently, so test with your own prompts.
Claude Haiku 5.5 vs Claude Opus 5.5 cost calculator
- $55.00/mo$0.0011 / request
- Claude Opus 5.5Anthropic$2,200/mo$0.04 / request
Standard-tier list prices. Long-context rates apply automatically where the provider publishes a threshold. Excludes cache-write surcharges, taxes, batch and volume discounts.
Claude Haiku 5.5 pricing notes
Anthropic’s fastest, lowest-cost model, priced by prompt length, with a 1M-token context window.
- Prompts over 100K tokens, counting cache reads and writes, are billed at $0.50 input / $2.50 output per 1M tokens.
- Cache writes cost $0.125 (5-minute cache) or $0.20 (1-hour cache) per 1M tokens, 5x that above 100K tokens.
- US-only inference (inference_geo: "us") costs 1.1x.
Claude Opus 5.5 pricing notes
Anthropic’s recommended default model for most workloads, with adaptive thinking always on.
- Cache reads cost 5% of the input price, against 10% on Claude Opus 5 and Sonnet 5.
- Cache writes cost $5 (5-minute cache) or $8 (1-hour cache) per 1M tokens.
- Fast mode costs $8 input / $40 output per 1M tokens.
- US-only inference (inference_geo: "us") costs 1.1x.
Frequently asked questions
- Is Claude Haiku 5.5 cheaper than Claude Opus 5.5?
- Claude Haiku 5.5 is 98% cheaper on input tokens ($0.10 vs $4.00 per 1M). Claude Haiku 5.5 is 98% cheaper on output tokens ($0.50 vs $20.00 per 1M). On our document Q&A workload (50,000 questions a month), Claude Haiku 5.5 costs $55.00 a month versus $2,200 for Claude Opus 5.5, 98% less.
- Which is more capable, Claude Haiku 5.5 or Claude Opus 5.5?
- Claude Opus 5.5 scores 166.8 on the Epoch Capabilities Index vs 159.0 for Claude Haiku 5.5.
- How much does Claude Haiku 5.5 cost per 1M tokens?
- Claude Haiku 5.5 costs $0.10 per 1M input tokens and $0.50 per 1M output tokens, and $0.01 per 1M cached input tokens on Anthropic’s standard tier.
- How much does Claude Opus 5.5 cost per 1M tokens?
- Claude Opus 5.5 costs $4.00 per 1M input tokens and $20.00 per 1M output tokens, and $0.20 per 1M cached input tokens on Anthropic’s standard tier.
- Which has the larger context window, Claude Haiku 5.5 or Claude Opus 5.5?
- Both offer a 1M-token context window.