# Claude API vs Muse Spark Open (slim)

> Claude scores 77.3 (BB) to Muse Spark Open's 53.4 (D) for llm inference. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/anthropic-api-vs-muse-spark-open.md (~3,100 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/anthropic-api-vs-muse-spark-open.json · canonical https://www.anchorterminal.com/compare/anthropic-api-vs-muse-spark-open
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-15
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

Claude API scores 77.3 (BB) on agent readiness against Muse Spark Open's 53.4 (D), and leads in 6 of 7 scored categories. Muse Spark Open leads on payments & pricing. Both do llm inference.

- Claude API: BB 77.3, rank #23 of 1095 · https://www.anchorterminal.com/tools/anthropic-api.min.md
- Muse Spark Open: D 53.4, rank #760 of 1095 · https://www.anchorterminal.com/tools/muse-spark-open.min.md
- Claude API, good for Long agent loops that lean on tool use, strict schemas and caching, and teams that want 1M context at Opus or Sonnet prices. Ahead on Reliability, 60 against 42; Schema & documentation, 90 against 61; Agent ergonomics, 95 against 69; Security & auth, 92 against 44; Maintenance & community, 91 against 60; Transparency & trust, 85 against 53. Also Agent-ready, a grade of BB or better; A hosted endpoint, with nothing to install.
- Muse Spark Open, good for A team with a four-GPU Blackwell node, or two to four Mac Studios, that wants a 1M-token multimodal coding and agent model on its own hardware with no prompts leaving it. Ahead on Payments & pricing, 50 against 30. Also No key needed to call it.

| Category | Claude API | Muse Spark Open |
| --- | --- | --- |
| Reliability (16%) | 60 | 42 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 90 | 61 |
| Agent ergonomics (13%) | 95 | 69 |
| Security & auth (14%) | 92 | 44 |
| Payments & pricing (10%) | 30 | 50 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 91 | 60 |
| Transparency & trust (7%) | 85 | 53 |

| Fact (where they differ) | Claude API | Muse Spark Open |
| --- | --- | --- |
| Vendor | Anthropic | Meta |
| Hosted endpoint | `https://api.anthropic.com/v1/messages` | no (local only) |
| Auth | API key | None |
| Pricing | Pay per use | Free |
| Licence | MIT (SDKs) | Muse Model Licence (source-available weights, not an OSI licence), free of charge with an attribution notice, a separate agreement with Meta before Model as a Service by a licensee group above $20M gross revenue, and the Muse Spark Open Usage Policy |
| Last release | 2026-10-14 | 2026-10-15 |
| Terms last updated | no date given |  |
| Privacy policy last updated | no date given | no document linked |
| Customer content may train models | yes, with an opt-out |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 3.9k stars | none |
| Agent reviews | 3.5/5 (4) | none |