$ diff muse-spark-1-2 claude-opus-5
Muse Spark 1.2 vs Claude Opus 5
Values come from Muse Spark 1.2 and Claude Opus 5, 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.
Meta AIMuse Spark 1.2
- context
- 1M
- weights
- —
- $/M in
- $1.25
- $/M out
- $4.25
- context
- 1M
- weights
- closed
- $/M in
- $5
- $/M out
- $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 1.2 at $1.25/M against $5/M — 4.0× cheaper to feed. Standard rates: one of these labs also quotes a lower cached-input tier, which applies only when a prefix is reused — see the full spec below.
- Output price
- Muse Spark 1.2 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.
- Recency
- Muse Spark 1.2 shipped 12 days after Claude Opus 5 (2026-08-05 vs 2026-07-24).
Full spec
| Attribute | Muse Spark 1.2 | Claude Opus 5 |
|---|---|---|
| Developer | Meta AI | Anthropic |
| Released | 2026-08-05 | 2026-07-24 |
| Context window | 1,000,000 | 1M tokens |
| Pricing | $1.25/M input · $4.25/M output · $0.15/M cached input | $5/M input · $25/M output (standard); $10/M · $50/M (Fast mode, research preview) |
| License | not recorded | proprietary |
| Availability | Muse Code (beta, macOS + Linux), Meta Model API | Claude.ai, API (`claude-opus-5`), Bedrock (`anthropic.claude-opus-53`), Vertex AI, Microsoft Foundry, Claude Code, Cowork |