AI model comparison
Solar Mini 4 vs GLM 5.3 Flash
Side by side comparison of Solar Mini 4 and GLM 5.3 Flash on pricing, benchmark scores, context window, and more.
Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window.
- Input / 1M
- $0.05
- Output / 1M
- $0.20
- Context
- 524K
GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks.
- Input / 1M
- $0.15
- Output / 1M
- $0.50
- Context
- 1.05M
Comparing image generators? Compare image models
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
Solar Mini 4
2.8x cheaper for a typical chat
Higher intelligence score
Not available
Not enough benchmark data
Larger context window
GLM 5.3 Flash
1.05M vs 524K tokens
Newer release
Solar Mini 4
Released September 23, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
Coding index
Agentic index
Pricing
Solar Mini 4 vs GLM 5.3 Flash API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | ||
|---|---|---|
| Input tokensPer 1M tokens | $0.05 | $0.15 |
| Output tokensPer 1M tokens | $0.20 | $0.50 |
| Cached input (read)Per 1M tokens | $0.01 | $0.03 |
| Cache writePer 1M tokens | Not available | Not available |
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 | 524K tokens | 1.05M tokens |
| Max output | 131K tokens | 944K tokens |
| Input types | Text | Image, Text, Video |
| Output types | Text | Text |
| Reasoning effort levels | Max, Extra high, High, Medium, Low, Minimal, None | Max, High, Low |
| Default reasoning effort | Medium | Max |
| Release date | September 23, 2026 | August 26, 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 | 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.
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Our take
Solar Mini 4 is 2.8x cheaper for a typical chat. GLM 5.3 Flash has the larger context window (1.05M vs 524K 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 Solar Mini 4 or GLM 5.3 Flash cheaper?
Solar Mini 4 is cheaper for a typical chat (2K input tokens and 500 output tokens). Solar Mini 4 costs $0.05 per 1M input tokens and $0.20 per 1M output tokens, while GLM 5.3 Flash costs $0.15 per 1M input tokens and $0.50 per 1M output tokens.
Which has a bigger context window, Solar Mini 4 or GLM 5.3 Flash?
GLM 5.3 Flash supports up to 1.05M tokens of context, compared with 524K for Solar Mini 4.
Can I use Solar Mini 4 and GLM 5.3 Flash at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Solar Mini 4 and GLM 5.3 Flash answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Solar Mini 4 and GLM 5.3 Flash at the same time. Compare the answers side by side and keep the best one.