AI model comparison
Muse Spark 1.2 vs Grok 4.5
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
Meta
Muse Spark 1.2
Muse Spark 1.2 is a reasoning model from Meta, designed for complex agentic tasks.
- Input / 1M
- $1.25
- Output / 1M
- $4.25
- Context
- 1.05M
xAI
Grok 4.5
Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.
- Input / 1M
- $2
- Output / 1M
- $6
- Context
- 500K
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
Muse Spark 1.2
1.5x cheaper for a typical chat
Higher intelligence score
Muse Spark 1.2
39.6 vs 38.8 on Artificial Analysis
Larger context window
Muse Spark 1.2
1.05M vs 500K tokens
Newer release
Muse Spark 1.2
Released August 5, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
Coding index
Agentic index
Pricing
Muse Spark 1.2 vs Grok 4.5 API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | ||
|---|---|---|
| Input tokensPer 1M tokens | $1.25 | $2 |
| Output tokensPer 1M tokens | $4.25 | $6 |
| Cached input (read)Per 1M tokens | $0.15 | $0.30 |
| Cache writePer 1M tokens | Not available | Not available |
| Long-context pricingPer 1M tokens, for very long prompts | Same rate at any length | $4 in / $12 out above 200K |
| Web searchPer request | $0.0025 | $0.005 |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
Coding task
30K in, 4K out
Long document summary
150K in, 2K out
Specs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | ||
|---|---|---|
| Context window | 1.05M tokens | 500K tokens |
| Max output | 944K tokens | 450K tokens |
| Input types | File, Image, Text, Video | File, Image, Text |
| Output types | Text | Text |
| Reasoning effort levels | Extra high, High, Medium, Low, Minimal | High, Medium, Low |
| Default reasoning effort | Medium | High |
| Release date | August 5, 2026 | July 8, 2026 |
Features
Supported features
API features available for each model.
| Metric | ||
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Supported | Supported |
| Stop sequences | Not supported | Not supported |
| Deterministic seed | Not supported | Supported |
| Verbosity control | Not supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
- Muse Spark 1.2 vs GLM 5.3
- Muse Spark 1.2 vs GLM 5.3 Flash
- Muse Spark 1.2 vs Gemini 3.8 Flash
- Muse Spark 1.2 vs Qwen3.8 2.4T A95B
- Muse Spark 1.2 vs Gemini 3.7 Flash
- Muse Spark 1.2 vs DeepSeek V4.1 Flash
- Muse Spark 1.2 vs Claude Sonnet 5
- Muse Spark 1.2 vs GPT-5.6 Luna
- Muse Spark 1.2 vs DeepSeek V4 Pro 0813
- Muse Spark 1.2 vs Muse Spark 1.1
Our take
Muse Spark 1.2 is 1.5x cheaper for a typical chat. Muse Spark 1.2 scores higher on the Artificial Analysis Intelligence Index (39.6 vs 38.8). Muse Spark 1.2 has the larger context window (1.05M vs 500K tokens). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is Muse Spark 1.2 or Grok 4.5 cheaper?
Muse Spark 1.2 is cheaper for a typical chat (2K input tokens and 500 output tokens). Muse Spark 1.2 costs $1.25 per 1M input tokens and $4.25 per 1M output tokens, while Grok 4.5 costs $2 per 1M input tokens and $6 per 1M output tokens.
Which has a bigger context window, Muse Spark 1.2 or Grok 4.5?
Muse Spark 1.2 supports up to 1.05M tokens of context, compared with 500K for Grok 4.5.
Is Muse Spark 1.2 smarter than Grok 4.5?
On the Artificial Analysis Intelligence Index, Muse Spark 1.2 scores 39.6 and Grok 4.5 scores 38.8, putting Muse Spark 1.2 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use Muse Spark 1.2 and Grok 4.5 at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Muse Spark 1.2 and Grok 4.5 answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Muse Spark 1.2 and Grok 4.5 at the same time. Compare the answers side by side and keep the best one.