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Compare performance benchmarks, coding intelligence, reasoning evaluations, context limits, and API economics between Muse Spark Open (Meta) and Claude Haiku 5.5 (Anthropic).
| Metric / Capability | Muse Spark Open | Claude Haiku 5.5 |
|---|---|---|
| Developer / Organization | Meta | Anthropic |
| Release Date | 2026-10-15 | 2026-10-07 |
| Deployment / Weights | Open Weights | Proprietary Cloud API |
| Context Window | 1.0M tokens (1,048,576 tokens) | 1M tokens (1,000,000 tokens) |
| Input Pricing (/1M Tokens) | Free (Open Weights) | $0.1 |
| Output Pricing (/1M Tokens) | Free (Open Weights) | $0.5 |
| Benchmark / Domain | Muse Spark Open | Claude Haiku 5.5 | Advantage |
|---|---|---|---|
Artificial Analysis Intelligence Index Composite index aggregating 10+ evaluations of general reasoning and knowledge. | — | 43.4% | — |
Artificial Analysis Coding Agent Index v2.0 Composite index of coding-agent systems (model + harness) across FrontierCode v1.1, SWE-Atlas-QnA, and Terminal-Bench v4. | 26.3% | 37.3% | Claude Haiku 5.5 (+42%) |
Terminal-Bench 4.0 Sandboxed command-line tasks requiring shell and file-system operation. | — | 39.2% | — |
ARC-AGI-2 Novel visual grid puzzles requiring abstract rule induction. | 57.5% | 61.3% | Claude Haiku 5.5 (+7%) |
Humanity's Last Exam Expert-written questions across hundreds of disciplines designed to resist saturation. | — | 45.9% | — |
FrontierMath v2 (Tiers 1-3) Unpublished, research-level mathematics problems across Tiers 1-3. | — | 75.1% | — |
Design Arena ELO Human-preference ELO across UI, 3D, data-visualization, and game-dev generations. | 1338 | 1344 | Claude Haiku 5.5 leads |
Claude Haiku 5.5 outperforms Muse Spark Open across 3 evaluated benchmarks compared to 0 for Muse Spark Open, excelling in Artificial Analysis Coding Agent Index v2.0, ARC-AGI-2, Design Arena ELO.
Muse Spark Open offers a larger context capacity of 1.0M tokens (1,048,576 tokens), compared to 1M tokens for Claude Haiku 5.5.
Muse Spark Open is more cost-effective. Input tokens cost $Free (Open Weights)/M tokens vs $0.1/M tokens for Claude Haiku 5.5.
Muse Spark Open is an open-weights model. Claude Haiku 5.5 is a proprietary cloud API.
Analyze 130+ models side-by-side using interactive radar charts, cost-efficiency quadrant plots, and live dataset filters on the full NeuBench index.
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