$ diff muse-spark-1-2 gpt-5-6-sol
Muse Spark 1.2 vs GPT-5.6 Sol
Values come from Muse Spark 1.2 and GPT-5.6 Sol, 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
- 1.1M
- weights
- closed
- $/M in
- $5
- $/M out
- $30
What actually differs
- Context window
- GPT-5.6 Sol takes 1.1M against 1M — modestly more room in a single request.
- 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 $30/M — 7.1× 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 27 days after GPT-5.6 Sol (2026-08-05 vs 2026-07-09).
Full spec
| Attribute | Muse Spark 1.2 | GPT-5.6 Sol |
|---|---|---|
| Developer | Meta AI | OpenAI |
| Released | 2026-08-05 | 2026-07-09 |
| Context window | 1,000,000 | 1.05M tokens |
| Pricing | $1.25/M input · $4.25/M output · $0.15/M cached input | $5/M input · $30/M output (Sol; family tiers below) |
| License | not recorded | proprietary (API-only; no weight release) |
| Availability | Muse Code (beta, macOS + Linux), Meta Model API | ChatGPT (subscription), API |