gpt-oss-20b vs Solar Pro 4
At a Glance
| Compare |  gpt-oss-20bOpenAI |  Solar Pro 4Upstage |
|---|---|---|
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $0.018Openrouter ↗ · Sep 23, 2026 | $0.090Upstage ↗ · Sep 18, 2026 |
| Output priceFrom · USD / 1M tokens | $0.090Openrouter ↗ · Sep 23, 2026 | $0.36Upstage ↗ · Sep 18, 2026 |
| Context windowMaximum documented tokens | 131K | 524K |
| Model facts checked | Aug 28, 2026View model evidence → | Sep 18, 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 | gpt-oss-20b | Solar Pro 4 |
|---|---|---|
| Developer | OpenAI | Upstage |
| Family | Gpt Oss | Solar Pro |
| Model | gpt-oss-20b | Solar Pro 4 |
| Version | gpt-oss-20b | Solar Pro 4 |
| Lifecycle | active | active |
| Released | Unknown | 2026-08-14 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
| Context window | 131K | 524K |
| Total parameters | 20.9B | Unknown |
| Active parameters | 3.6B | Unknown |
| License | apache-2.0 | Unknown |
| Open weights | Yes | No |
| API available | Yes | Yes |
| Self-hostable | Yes | Yes |
| Provider access | Deepinfra (Standard), Groq (Standard), Hugging Face (Standard), Openrouter (Standard), Together Ai (Serverless, Standard) | Upstage (Standard) |
| Capabilities | chat, generation, reasoning, tools | agents, chat, generation, reasoning, structured_outputs, tools |
| Supported languages | Unknown | English, Korean, Japanese |
| Training data cutoff | Unknown | February 2026 |
gpt-oss-20b Capabilities
Solar Pro 4 Capabilities
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Primary Evidence
Sources and Freshness
Questions
gpt-oss-20b vs Solar Pro 4 FAQs
Is gpt-oss-20b or Solar Pro 4 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both gpt-oss-20b and Solar Pro 4, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, gpt-oss-20b or Solar Pro 4?+
gpt-oss-20b is $0.018 and Solar Pro 4 is $0.090 per million tokens, so gpt-oss-20b is cheaper on this metric. gpt-oss-20b is $0.090 and Solar Pro 4 is $0.36 per million tokens, so gpt-oss-20b is cheaper on this metric.
Which has a larger context window, gpt-oss-20b or Solar Pro 4?+
Solar Pro 4 has the larger sourced context window. gpt-oss-20b supports 131K and Solar Pro 4 supports 524K.
Which performs better in benchmarks, gpt-oss-20b or Solar Pro 4?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can gpt-oss-20b or Solar Pro 4 be self-hosted?+
Both models have the same recorded self-hosting status: supported. gpt-oss-20b is open weight; Solar Pro 4 is not marked open weight.
Can gpt-oss-20b and Solar Pro 4 understand images?+
gpt-oss-20b is not documented with image input; Solar Pro 4 is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, gpt-oss-20b or Solar Pro 4?+
Neither has a larger sourced maximum output. gpt-oss-20b is — and Solar Pro 4 is 131K.
Do gpt-oss-20b and Solar Pro 4 support reasoning and tool use?+
gpt-oss-20b: reasoning and tool calling. Solar Pro 4: reasoning and tool calling. Feature support does not establish relative quality.
Which is available from more inference providers, gpt-oss-20b or Solar Pro 4?+
gpt-oss-20b has 5 sourced provider routes; Solar Pro 4 has 1, so gpt-oss-20b has broader tracked availability.
Which offers better value, gpt-oss-20b or Solar Pro 4?+
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.