Compare / head-to-head
Gemini 3.1 Pro PreviewvsSolar Open 2 250B-A15B
Gemini 3.1 Pro Preview leads 2 of 2 shared benchmarks. Gemini 3.1 Pro Preview has the larger context window (1.0M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
2 – 0
Gemini 3.1 Pro Preview leads
Cheaper per token
—
list price, input + output
Larger context
Gemini 3.1 Pro Preview
1.0M tokens
Provider uptime (30d)
100% · —
Google · Upstage
Gemini 3.1 Pro Preview
Google · released 2026-02-19
textvisionaudio
Solar Open 2 250B-A15B
Upstage · released 2026-07-24
text
- Context
- 1M
- Max out
- —
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 16 · 5 core
Quality
Benchmark matrix
2 shared · 7 only Gemini 3.1 Pro Preview · 14 only Solar Open 2 250B-A15B| Benchmark | Gemini 3.1 Pro Preview | Solar Open 2 250B-A15B | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 2 | ||||
| GPQA Diamond | 94.3% ↗ | 86.3% ↗ | +8 pt | Gemini 3.1 Pro Preview |
| AIME 2026 | 98.3% ↗matharena ⚠ | 95.7% ↗ | +2.6 pt | Gemini 3.1 Pro Preview |
| Only Gemini 3.1 Pro Preview reports · 7 | ||||
| LMArena Elo | 1480.1 ↗ | not reported | — | — |
| ARC-AGI-2 | 77.1% ↗ | not reported | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 26.8% ↗epoch | not reported | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 59.6% ↗epoch | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 95.6% ↗epoch | not reported | — | — |
| SimpleQA Verified | 73.5% ↗epoch | not reported | — | — |
| SWE-Bench Pro | 54.2% ↗ | not reported | — | — |
| Only Solar Open 2 250B-A15B reports · 14 | ||||
| SWE-bench Verified | not reported | 70.4% ↗ | — | — |
| MMLU-Pro | not reported | 86.2% ↗ | — | — |
| Humanity's Last Exam (no tools) | not reported | 28.8% ↗ | — | — |
| AA-LCR | not reported | 62.3% ↗ | — | — |
| APEX-Agents | not reported | 16.6% ↗ | — | — |
| ArtifactsBench | not reported | 55.9% ↗ | — | — |
| GDPval-AA v2 | not reported | 1128 ↗ | — | — |
| HMMT 2026-02 | not reported | 93.9% ↗ | — | — |
| IFBench | not reported | 80% ↗ | — | — |
| LiveCodeBench v6 | not reported | 92.4% ↗ | — | — |
| MCP Atlas | not reported | 58.2% ↗ | — | — |
| Multi-Challenge | not reported | 61% ↗ | — | — |
| Tau3-Bench (banking) | not reported | 19.6% ↗ | — | — |
| Terminal Bench Hard | not reported | 28.3% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Gemini 3.1 Pro Preview minus Solar Open 2 250B-A15B in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Gemini 3.1 Pro Preview | Solar Open 2 250B-A15B | Edge |
|---|---|---|---|
| Context window | 1.0M tokens | 1M tokens | Gemini 3.1 Pro Preview |
| Max output | 66K tokens | — | — |
| Input price / 1M | $2 ↗ | — | — |
| Output price / 1M | $12 ↗ | — | — |
| Cached input / 1M | $0.2 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $14 | — | — |
| Modalities | text · vision · audio | text | Gemini 3.1 Pro Preview |
| Released | 2026-02-19 | 2026-07-24 | — |
| Cited benchmark scores | 10 | 16 | — |
Reliability
Provider status
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Solar Open 2 250B-A15B vs …
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Which one wins on your data?
Public benchmarks are a starting point. Run Gemini 3.1 Pro Preview and Solar Open 2 250B-A15B on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.