Solar Pro 4 vs GLM 5.1
At a Glance
| Compare |  Solar Pro 4Upstage |  GLM 5.1Z.ai |
|---|---|---|
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $0.090Upstage ↗ · Sep 18, 2026 | $1.05Deepinfra ↗ · Sep 23, 2026 |
| Output priceFrom · USD / 1M tokens | $0.36Upstage ↗ · Sep 18, 2026 | $3.50Deepinfra ↗ · Sep 23, 2026 |
| Context windowMaximum documented tokens | 524K | 203K |
| Model facts checked | Sep 18, 2026View model evidence → | Aug 28, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
Side-by-Side Facts
| Field | Solar Pro 4 | GLM-5.1 |
|---|---|---|
| Developer | Upstage | Z.ai |
| Family | Solar Pro | Glm 5 1 |
| Model | Solar Pro 4 | GLM-5.1 |
| Version | Solar Pro 4 | GLM-5.1 |
| Lifecycle | active | active |
| Released | 2026-08-14 | Unknown |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
| Context window | 524K | 203K |
| Total parameters | Unknown | 753.9B |
| Active parameters | Unknown | Unknown |
| License | Unknown | mit |
| Open weights | No | Yes |
| API available | Yes | Yes |
| Self-hostable | Yes | Yes |
| Provider access | Upstage (Standard) | Deepinfra (Standard), Hugging Face (Standard), Openrouter (Standard), Together Ai (Standard) |
| Capabilities | agents, chat, generation, reasoning, structured_outputs, tools | chat, generation, reasoning, tools |
| Supported languages | English, Korean, Japanese | Unknown |
| Training data cutoff | February 2026 | Unknown |
Solar Pro 4 Capabilities
GLM 5.1 Capabilities
Related Comparisons
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Primary Evidence
Sources and Freshness
Questions
Solar Pro 4 vs GLM 5.1 FAQs
Is Solar Pro 4 or GLM 5.1 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Solar Pro 4 and GLM 5.1, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Solar Pro 4 or GLM 5.1?+
Solar Pro 4 is $0.090 and GLM 5.1 is $1.05 per million tokens, so Solar Pro 4 is cheaper on this metric. Solar Pro 4 is $0.36 and GLM 5.1 is $3.50 per million tokens, so Solar Pro 4 is cheaper on this metric.
Which has a larger context window, Solar Pro 4 or GLM 5.1?+
Solar Pro 4 has the larger sourced context window. Solar Pro 4 supports 524K and GLM 5.1 supports 203K.
Which performs better in benchmarks, Solar Pro 4 or GLM 5.1?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Solar Pro 4 or GLM 5.1 be self-hosted?+
Both models have the same recorded self-hosting status: supported. Solar Pro 4 is not marked open weight; GLM 5.1 is open weight.
Can Solar Pro 4 and GLM 5.1 understand images?+
Solar Pro 4 is not documented with image input; GLM 5.1 is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Solar Pro 4 or GLM 5.1?+
Neither has a larger sourced maximum output. Solar Pro 4 is 131K and GLM 5.1 is —.
Do Solar Pro 4 and GLM 5.1 support reasoning and tool use?+
Solar Pro 4: reasoning and tool calling. GLM 5.1: reasoning and tool calling. Feature support does not establish relative quality.
Which is available from more inference providers, Solar Pro 4 or GLM 5.1?+
Solar Pro 4 has 1 sourced provider route; GLM 5.1 has 4, so GLM 5.1 has broader tracked availability.
Which offers better value, Solar Pro 4 or GLM 5.1?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.