Claude Haiku 4.5 vs Muse Spark Open
Price and specs side by side · USD per 1M tokens · verified 2026-10-23
// side by side
| metric | Claude Haiku 4.5 | Muse Spark Open |
|---|
| input / 1M | $1.00 | $1.25 |
| output / 1M | $5.00 | $4.25 |
| blended (3:1) | $2.00 | $2.00 |
| cache read / 1M | $0.10 | $0.15 |
| context | 200K | 1.05M |
| max output | 64K | 131.1K |
| input types | text · image · pdf | text · image |
| reasoning | yes | yes |
| tool calling | yes | yes |
| structured output | yes | yes |
| open weights | no | yes |
| released | 2025-10-15 | 2026-10-15 |
| knowledge cutoff | 2025-02-28 | 2026-01-04 |
| lab | Anthropic | Meta |
// monthly cost scenarios
| workload | tokens in / out | Claude Haiku 4.5 | Muse Spark Open |
|---|
| Chatbot | 10M / 2M | $20.00 | $21.00 |
| RAG app | 50M / 5M | $75.00 | $83.75 |
| Coding agent | 20M / 10M | $70.00 | $67.50 |
// verdict
- Claude Haiku 4.5 and Muse Spark Open have the same blended price.
- Muse Spark Open has the larger context window (1.05M vs 200K tokens).
- Chatbot (10M input / 2M output tokens per month): Claude Haiku 4.5 costs $20.00 vs $21.00 for Muse Spark Open, saving $1.00 per month.
- RAG app (50M input / 5M output tokens per month): Claude Haiku 4.5 costs $75.00 vs $83.75 for Muse Spark Open, saving $8.75 per month.
- Coding agent (20M input / 10M output tokens per month): Muse Spark Open costs $67.50 vs $70.00 for Claude Haiku 4.5, saving $2.50 per month.
// Claude Haiku 4.5 or Muse Spark Open: which one to choose
- Choose Muse Spark Open for long documents and large codebases (1.05M-token context).
- Choose Muse Spark Open if you want open weights you can self-host.