AI model comparison
Solar Pro 4 vs Inkling Small
Side by side comparison of Solar Pro 4 and Inkling Small on pricing, benchmark scores, context window, and more.
Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window.
- Input / 1M
- $0.15
- Output / 1M
- $0.60
- Context
- 524K
Inkling Small is an open-weight multimodal mixture-of-experts model from Thinking Machines Lab, with 12B active parameters out of 276B total.
- Input / 1M
- $0.45
- Output / 1M
- $1.20
- Context
- 524K
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 Pro 4
2.5x cheaper for a typical chat
Higher intelligence score
Solar Pro 4
28.2 vs 25.7 on Artificial Analysis
Larger context window
Tie
524K vs 524K tokens
Newer release
Solar Pro 4
Released August 10, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
Coding index
Agentic index
Pricing
Solar Pro 4 vs Inkling Small API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | ||
|---|---|---|
| Input tokensPer 1M tokens | $0.15 | $0.45 |
| Output tokensPer 1M tokens | $0.60 | $1.20 |
| Cached input (read)Per 1M tokens | $0.03 | $0.10 |
| 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 | 524K tokens |
| Max output | 131K tokens | 262K tokens |
| Input types | Text | Audio, Image, Text |
| Output types | Text | Text |
| Reasoning effort levels | Max, Extra high, High, Medium, Low, Minimal, None | Max, High, Medium, Low, Minimal, None |
| Default reasoning effort | Medium | High |
| Release date | August 10, 2026 | July 30, 2026 |
Features
Supported features
API features available for each model.
| Metric | ||
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Not supported |
| JSON mode | Supported | Not 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
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Our take
Solar Pro 4 is 2.5x cheaper for a typical chat. Solar Pro 4 scores higher on the Artificial Analysis Intelligence Index (28.2 vs 25.7). 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 Pro 4 or Inkling Small cheaper?
Solar Pro 4 is cheaper for a typical chat (2K input tokens and 500 output tokens). Solar Pro 4 costs $0.15 per 1M input tokens and $0.60 per 1M output tokens, while Inkling Small costs $0.45 per 1M input tokens and $1.20 per 1M output tokens.
Which has a bigger context window, Solar Pro 4 or Inkling Small?
Solar Pro 4 supports up to 524K tokens of context, compared with 524K for Inkling Small.
Is Solar Pro 4 smarter than Inkling Small?
On the Artificial Analysis Intelligence Index, Solar Pro 4 scores 28.2 and Inkling Small scores 25.7, putting Solar Pro 4 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use Solar Pro 4 and Inkling Small at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Solar Pro 4 and Inkling Small answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Solar Pro 4 and Inkling Small at the same time. Compare the answers side by side and keep the best one.