Muse Spark 1.3 is $8.75 cheaper per 1M input tokens (87.5% lower; 8x difference).
API cost decision in 10 seconds
NewGPT-6 Astra vs NewMuse Spark 1.3
Pick Muse Spark 1.3 for lower cost; pick GPT-6 Astra only if the larger context window matters more.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Muse Spark 1.3 for lower cost; pick GPT-6 Astra only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Muse Spark 1.3 is estimated at $3.38 vs $35 for GPT-6 Astra, saving $31.62 (90.4% lower).
Cost-first pickMuse Spark 1.3
Context-first pickGPT-6 Astra
Sample savings$31.6290.4%
10x traffic gap$316.25
GPT-6 Astra has more context, but Muse Spark 1.3 saves $31.62 on the standard workload. At 10x that traffic, the same price gap is about $316.25. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Muse Spark 1.3 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | GPT-6 Astra | Muse Spark 1.3 |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Muse Spark 1.3 | $75 | $8.38 |
| Balanced workload | 1M input + 1M output | Muse Spark 1.3 | $60 | $5.5 |
| Output-heavy chatbot | 1M input + 5M output | Muse Spark 1.3 | $260 | $22.5 |
Muse Spark 1.3 is $45.75 cheaper per 1M output tokens (91.5% lower; 11.8x difference).
GPT-6 Astra has 1.42K more context (1x larger).
Muse Spark 1.3 is $31.62 cheaper on the standard workload (90.4% lower).
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
Muse Spark 1.3 has the lower input price; Muse Spark 1.3 has the lower output price; GPT-6 Astra offers the larger context window. For the 1M input plus 500K output sample, Muse Spark 1.3 is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $35 for GPT-6 Astra and $3.38 for Muse Spark 1.3.
Choose GPT-6 Astra when you care most about larger context window.
Choose Muse Spark 1.3 when you care most about lower input-token price, and lower output-token price.
- On the standard 1M input plus 500K output workload, Muse Spark 1.3 is estimated at $3.38 vs $35 for GPT-6 Astra, saving $31.62 (90.4% lower).
- Muse Spark 1.3 is $31.62 cheaper on the standard workload (90.4% lower).
- Muse Spark 1.3 is $8.75 cheaper per 1M input tokens (87.5% lower; 8x difference).
- Muse Spark 1.3 is $45.75 cheaper per 1M output tokens (91.5% lower; 11.8x difference).
- GPT-6 Astra has 1.42K more context (1x larger).
| Feature | NewGPT-6 Astra (OpenAI) | NewMuse Spark 1.3 (Meta) |
|---|---|---|
| Input Price prompt tokens per 1M | $10 | $1.25 |
| Completion Price per 1M tokens | $50 | $4.25 |
| Sample Workload Cost 1M input + 500K output | $35 | $3.38 |
| Context Window | 1.05M | 1.05M |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Muse Spark 1.3 | On the standard 1M input plus 500K output workload, Muse Spark 1.3 is estimated at $3.38 vs $35 for GPT-6 Astra, saving $31.62 (90.4% lower). |
| High-volume input processing | Muse Spark 1.3 | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Muse Spark 1.3 | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | GPT-6 Astra | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- gpt-oss-120b (free) can replace GPT-6 Astra when lower sample workload cost matters most: $0.
- gpt-oss-20b (free) can replace GPT-6 Astra when lower sample workload cost matters most: $0.
- gpt-oss-20b can replace GPT-6 Astra when lower sample workload cost matters most: $0.1.
- gpt-oss-120b can replace GPT-6 Astra when lower sample workload cost matters most: $0.12.
- Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- GLM 5.3 Flash offers 1.31M context with $0.2 sample workload cost.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.15 sample workload cost.
- GLM 5.3 Flash · Z.ai · #1
- GPT-5.6 Luna · OpenAI · #2
- DeepSeek V4 Flash 0731 · DeepSeek · #3
- Hy4 preview · Tencent · #4
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