$ diff claude-opus-5 muse-spark
Claude Opus 5 vs Muse Spark
Anthropic and Meta AI, side by side. Every value below is the one recorded on the model’s own wiki page, with its citation — nothing is estimated.
AnthropicClaude Opus 5
- context
- 1M
- weights
- closed
- $/M in
- $5
- $/M out
- $25
- context
- 1M
- weights
- open
- $/M in
- $1.25
- $/M out
- $4.25
What actually differs
- Context window
- Identical — both accept 1M tokens, so context length is not a reason to pick either.
- Input price
- Muse Spark at $1.25/M against $5/M — 4.0× cheaper to feed.
- Output price
- Muse Spark at $4.25/M against $25/M — 5.9× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Weights
- Muse Spark publishes weights (proprietary (closed / API-only, not open-weights)); Claude Opus 5 is API-only. That decides self-hosting, air-gapped deployment and fine-tuning before any capability question does.
- Recency
- Claude Opus 5 shipped 107 days after Muse Spark (2026-07-24 vs 2026-04-08).
Full spec
| Attribute | Claude Opus 5 | Muse Spark |
|---|---|---|
| Developer | Anthropic | Meta AI |
| Released | 2026-07-24 | 2026-04-08 |
| Context window | 1M tokens | 1,000,000 tokens (1.1) |
| Pricing | $5/M input · $25/M output (standard); $10/M · $50/M (Fast mode, research preview) | $1.25/M input · $4.25/M output (Meta Model API, public preview) |
| License | proprietary | proprietary (closed / API-only, not open-weights) |
| Availability | Claude.ai, API (`claude-opus-5`), Bedrock (`anthropic.claude-opus-53`), Vertex AI, Microsoft Foundry, Claude Code, Cowork | Meta Model API (public preview, US-based developers only) |
Values come from Claude Opus 5 and Muse Spark, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing. How these pages are produced.