text model comparison
GPT-4.1 mini vs Solar Pro 4
GPT-4.1 mini and Solar Pro 4 are both current text models, from OpenAI and Upstage. Solar Pro 4 is 25% cheaper per 1M input tokens than GPT-4.1 mini, $0.30 vs $0.40. On Arena Text, GPT-4.1 mini scores 1383 Elo and Solar Pro 4 1386 Elo (Arena, measured October 8, 2026). GPT-4.1 mini has the larger context window, 1,047,576 vs 512,000 tokens.
Data verified October 13, 2026 · Dataset 2026-10-13
Side by side
Standard-tier prices in effect today. The better value in each row is highlighted.
| Fact | GPT-4.1 mini | Solar Pro 4 |
|---|---|---|
| Price per 1M input tokens | $0.40 | $0.30 (better) |
| Price per 1M output tokens | $1.60 | $1.20 (better) |
| Cost of 10M input and 2M output tokens | $7.20 | $5.40 (better) |
| Arena Text | 1383 Elo (#46 of 49) | 1386 Elo (#45 of 49) (better) |
| GPQA Diamond | 65.8% (#39 of 40) | Not measured |
| FrontierMath Tiers 1-3 (v2) | 6.7% (#39 of 40) | Not measured |
| SimpleQA Verified | 12.7% (#35 of 36) | Not measured |
| Provider | OpenAI | Upstage |
| Release date | April 14, 2025 | August 6, 2026 |
| Access | API only | API only |
| Context window | 1,047,576 tokens | 512,000 tokens |
| Max output | 32,768 tokens | 128,000 tokens |
| Input | text, image | text |
| Output | text | text |
When to choose each
GPT-4.1 mini
Best for
- Cost-sensitive long-context API evaluation
Watch out for
- Not in the pinned LiveBench snapshot; its independent scores here come from Epoch AI's own GPQA Diamond, FrontierMath and SimpleQA Verified runs
Solar Pro 4
Best for
- Korean and Japanese enterprise workloads
- Multi-step agent work with tool calls
Watch out for
- A closed model: Upstage does not disclose its parameter count
- Several of its published benchmark figures are in-house evaluations
GPT-4.1 mini vs Solar Pro 4 FAQ
Which is cheaper, GPT-4.1 mini or Solar Pro 4?
Solar Pro 4 is 25% cheaper per 1M input tokens than GPT-4.1 mini, $0.30 vs $0.40. For 10M input and 2M output tokens, GPT-4.1 mini costs $7.20 and Solar Pro 4 $5.40 at standard rates.
Which scores higher on independent benchmarks, GPT-4.1 mini or Solar Pro 4?
Solar Pro 4 leads on Arena Text, 1386 Elo to 1383 Elo. Scores are independent evaluations, not either vendor's launch figures.
Which has the larger context window, GPT-4.1 mini or Solar Pro 4?
GPT-4.1 mini has the larger context window, 1,047,576 vs 512,000 tokens.
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Production evaluation
Choosing between GPT-4.1 mini and Solar Pro 4?
Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- A head-to-head evaluation on your real workload
- Routing between models by cost and difficulty