Claude Opus 5.5 vs Muse Spark 1.3 Contributor
Detailed technical comparison between Claude Opus 5.5 (Anthropic) and Muse Spark 1.3 Contributor (Meta). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.
Comparison Snapshot
Muse Spark 1.3 Contributor
1,048,576 tokensTie
Equal CapabilityTie
Equal SpeedMuse Spark 1.3 Contributor
$0.10 / MTokClaude Opus 5.5
Claude Opus 5.5 is an advanced artificial intelligence model engineered by Anthropic. Tailored for complex multi-step reasoning, programming synthesis, and extended document comprehension, Claude Opus 5.5 represents a key architectural iteration in the Anthropic model family. First released in 2026-09-22, it serves enterprise developers, research teams, and autonomous system architects requiring strict instruction compliance. Featuring an input capacity of 1,000,000 tokens (approximately 1,333 words), Claude Opus 5.5 processes multi-file code repositories, lengthy technical reports, and complex prompts in a single inference call.
Muse Spark 1.3 Contributor
Muse Spark 1.3 Contributor is an advanced artificial intelligence model engineered by Meta. Tailored for complex multi-step reasoning, programming synthesis, and extended document comprehension, Muse Spark 1.3 Contributor represents a key architectural iteration in the Meta model family. First released in 2026-09-02, it serves enterprise developers, research teams, and autonomous system architects requiring strict instruction compliance. Featuring an input capacity of 1,048,576 tokens (approximately 1,398 words), Muse Spark 1.3 Contributor processes multi-file code repositories, lengthy technical reports, and complex prompts in a single inference call.
Technical Specifications
🏆 = Superior Spec| Specification | Claude Opus 5.5 | Muse Spark 1.3 Contributor |
|---|---|---|
| Provider | Anthropic | Meta |
| Context Window | 1,000,000 tokens | 1,048,576 tokens🏆 |
| Agent Suitability | Not yet benchmarked | Not yet benchmarked |
| Time to First Token (TTFT) | No public TTFT data | No public TTFT data |
| Deployment Model | managed api | managed api |
| Production Stability | Beta Access (est.) | Beta Access (est.) |
| API Available | Yes | Yes |
| Released Date | 2026-09-22 | 2026-09-02 |
API Pricing Comparison
Input Price per Million Tokens
Claude Opus 5.5
$4.00
Muse Spark 1.3 Contributor
$0.10
Output Price per Million Tokens
Claude Opus 5.5
$20.00
Muse Spark 1.3 Contributor
$0.20
💡 Cost Ratio: Muse Spark 1.3 Contributor is 40.0x cheaper per input token than Claude Opus 5.5.
Want to test both models live?
Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.
Benchmark Performance Metrics
Standardized Scores (0–100%)Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.
Claude Opus 5.5 Quirks & Gotchas
No developer gotchas reported.
Muse Spark 1.3 Contributor Quirks & Gotchas
No developer gotchas reported.
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