# Claude Haiku 4.5 vs Claude Haiku 5.5

As of October 21, 2026, Claude Haiku 4.5 costs 900% more per input token than Claude Haiku 5.5 ($1.00 vs $0.10 per 1M) and has a 200K-token context window versus 1M.

- Page: https://models.litellm.ai/compare/claude-haiku-4-5-vs-claude-haiku-5-5
- Claude Haiku 4.5: https://models.litellm.ai/models/claude-haiku-4-5
- Claude Haiku 5.5: https://models.litellm.ai/models/claude-haiku-5-5

## Side by side

| | Claude Haiku 4.5 | Claude Haiku 5.5 |
|---|---|---|
| Input, per 1M tokens | $1.00 | $0.10 |
| Output, per 1M tokens | $5.00 | $0.50 |
| Cache read, per 1M tokens | $0.10 | $0.01 |
| Cache write, per 1M tokens | $1.25 | $0.125 |
| Context window | 200,000 tokens | 1,000,000 tokens |
| Max output | 64,000 tokens | 128,000 tokens |
| Image input | Yes | Yes |
| Tool calling | Yes | Yes |
| Structured output (JSON) | Yes | Yes |
| Prompt caching | Yes | Yes |
| Reasoning | Yes | Yes |
| Providers on LiteLLM | 12 | 7 |
| Price shown is from | Anthropic | Anthropic |
| Added to LiteLLM | October 2025 | – |

Headline prices in USD per 1M tokens, from LiteLLM's model price file.

## Cheapest provider for each

- Claude Haiku 4.5: Anthropic at $1.00 input per 1M tokens (`claude-haiku-4-5`)
- Claude Haiku 5.5: Anthropic at $0.10 input per 1M tokens (`claude-haiku-5-5`)

## Benchmark scores

| Benchmark | Claude Haiku 4.5 | Claude Haiku 5.5 |
|---|---|---|
| Epoch Capabilities Index (Overall) | 142.2 | 159.3 |
| GPQA Diamond (Reasoning and knowledge) | 71.2% (32K) | 89.6% (max) |
| ARC-AGI-2 (Reasoning and knowledge) | 4.0% (32K) | 61.3% (xhigh) |
| SimpleQA Verified (Reasoning and knowledge) | 13.2% | 23.8% (max) |
| OTIS Mock AIME 2024-2025 (Math) | 66.7% (32K) | 98.9% (xhigh) |

From the Epoch AI Benchmarking Hub (https://epoch.ai/benchmarks), CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/), data as of October 9, 2026: Epoch's own runs and results it collects from each benchmark's leaderboard. Higher is better.

## When to pick which

- Claude Haiku 5.5: Costs 90% less per input token: $0.10 vs $1.00 per 1M.
- Claude Haiku 5.5: Larger context window: 1,000,000 vs 200,000 tokens.

## FAQ

### Which is cheaper, Claude Haiku 4.5 or Claude Haiku 5.5?

Claude Haiku 5.5 is cheaper at 3 input tokens per output token: $0.20 per 1M tokens blended ($0.10 input, $0.50 output), versus $2.00 ($1.00 and $5.00) for Claude Haiku 4.5, as of October 21, 2026.

### Which has the larger context window, Claude Haiku 4.5 or Claude Haiku 5.5?

Claude Haiku 5.5 has the larger context window: 1,000,000 tokens, versus 200,000 for Claude Haiku 4.5.

### Can I switch from Claude Haiku 4.5 to Claude Haiku 5.5 without changing my code?

Yes. Through LiteLLM both use the OpenAI format, so switching means changing the model name from "claude-haiku-4-5" to "claude-haiku-5-5", or pointing a LiteLLM gateway model alias at the other model. You can also use one as a fallback for the other.