Compare / head-to-head
GLM-5.1vsSolar Pro 4
GLM-5.1 leads 1 of 1 shared benchmark. Solar Pro 4 is 3.9x cheaper per token. Solar Pro 4 has the larger context window (512K tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
1 – 0
GLM-5.1 leads
Cheaper per token
Solar Pro 4
3.9x cheaper, input + output
Larger context
Solar Pro 4
512K tokens
Provider uptime (30d)
— · —
Z.ai · Upstage
GLM-5.1
Z.ai · released 2026-04-07
text
Solar Pro 4
Upstage · released 2026-08-20
text
Quality
Benchmark matrix
1 shared · 6 only GLM-5.1 · 1 only Solar Pro 4| Benchmark | GLM-5.1 | Solar Pro 4 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 1 | ||||
| LMArena Elo | 1462.4 ↗ | 1377.3 ↗ | +85.1 | GLM-5.1 |
| Only GLM-5.1 reports · 6 | ||||
| GPQA Diamond | 89.9% ↗epoch | not reported | — | — |
| AIME 2026 | 95.8% ↗matharena ⚠ | not reported | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 36.8% ↗epoch | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 93.3% ↗epoch | not reported | — | — |
| SimpleQA Verified | 34% ↗epoch | not reported | — | — |
| SWE-bench Verified (Epoch AI run) | 74.2% ↗epoch | not reported | — | — |
| Only Solar Pro 4 reports · 1 | ||||
| Artificial Analysis Intelligence Index | not reported | 42 ↗ | — | — |
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 GLM-5.1 minus Solar Pro 4 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 | GLM-5.1 | Solar Pro 4 | Edge |
|---|---|---|---|
| Context window | 200K tokens | 512K tokens | Solar Pro 4 |
| Max output | 131K tokens | — | — |
| Input price / 1M | $1.4 ↗ | $0.3 ↗ | Solar Pro 4 |
| Output price / 1M | $4.4 ↗ | $1.2 ↗ | Solar Pro 4 |
| Cached input / 1M | $0.26 ↗ | $0.06 ↗ | Solar Pro 4 |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $5.8 | $1.5 | Solar Pro 4 |
| Modalities | text | text | Tie |
| Released | 2026-04-07 | 2026-08-20 | — |
| Cited benchmark scores | 7 | 2 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GLM-5.1 vs …
Models sharing the most benchmarksMore matchups
Solar Pro 4 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GLM-5.1 and Solar Pro 4 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.