Claude Sonnet 5.5 vs Muse Spark 1.3
Claude Sonnet 5.5 from Anthropic and Muse Spark 1.3 from Meta, side by side. Every figure comes from the model registry. No markup on model usage: you pay the provider's list price.
| Attribute |   Claude Sonnet 5.5 |  Muse Spark 1.3 |
|---|---|---|
| Provider | Anthropic | Meta |
| Model id | anthropic/claude-sonnet-5-5 | meta/muse-spark-1.3 |
| Status | Available via Safeguard | Available via Safeguard |
| Input / 1M tokens | $2 | $1.25 |
| Output / 1M tokens | $10 | $4.25 |
| Price notes | Base price, full 1M context at standard rate. Cache hits $0.10/1M. Batch 50% off. | Standard tier (no training on your data). Cached input $0.15. No long-context premium. Contributor tier (muse-spark-1.3-contributor) is $0.10 / $0.20 in exchange for allowing training. Audio input not fully supported on 1.3. |
| Context | 1M | 1.05M |
| Parameters | Not published | Not published |
| Max output | 128,000 tokens | Not published |
| Modality | Text and image | Text and image |
| Weights | Closed | Closed |
| Zero data retention | Available | Not stated |
| Prompts go to | Anthropic (global routing by default) | Meta (Meta Model API) |
| Retention | Not used for model training without express permission, per Anthropic's API retention doc, conversation content is not retained by default except for Covered Models that require 30-day retention, flagged content and legal holds can be kept longer | Standard tier: prompts and completions not used to train Meta models, Contributor tier allows training in exchange for lower prices. No retention period published in the API docs |
| Region | Global by default, US-only inference via inference_geo at 1.1x pricing (Claude 4.6 and later) | Not stated |
| Price checked | 2026-10-08 | 2026-10-08 |
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