- Source
- Model registry API
- Verified
- 19 Sep 2026
- Confidence
- High
01What this is
- Author
- upstage
- Family
- Solar Open
- Task
- text-generation
- Hugging Face
- upstage/Solar-Open2-250B
- OpenRouter
- not listed
- Also known as
- Solar Open2, solar-open2-250b, upstage solar open
02Registry facts
- LicenceFACT
other
- FreshRetrieved 19 Sep 2026
- ParametersFACT
250.3B
- FreshRetrieved 19 Sep 2026
- Context lengthFACT
not returned by the registry
- Evidence not verified
- Downloads (30 days)FACT
3,073
- FreshRetrieved 19 Sep 2026
- LikesFACT
755
- FreshRetrieved 19 Sep 2026
- GatedFACT
no
- FreshRetrieved 19 Sep 2026
Model
- downloadsFACT
3073
- Verification may be outdatedRetrieved 19 Sep 2026
- gatedFACT
false
- Verification may be outdatedRetrieved 19 Sep 2026
- likesFACT
755
- Verification may be outdatedRetrieved 19 Sep 2026
- model licenseFACT
other
- Verification may be outdatedRetrieved 19 Sep 2026
- parameter countFACT
250287810304
- Verification may be outdatedRetrieved 19 Sep 2026
Other
- last modifiedFACT
2026-07-31T21:23:35.000Z
- Verification may be outdatedRetrieved 19 Sep 2026
- libraryFACT
transformers
- AgeingRetrieved 19 Sep 2026
03VRAM by quantisation
Peak VRAM for serving this model, computed by lib/deployment/hardware.ts from weights + KV cache + 15% runtime overhead. Inputs: 250.3B parameters, 8,192 tokens of context (assumed — none fetched yet), 4 concurrent requests (assumed).
| Quantisation | Weights | Total |
|---|---|---|
| bf16bf16 is two bytes per weight, the same arithmetic as fp16. | 500.58 GB | 592.95 GB |
| fp8 | 250.29 GB | 305.12 GB |
| int4 | 125.14 GB | 161.2 GB |
What this estimate assumes
- Weights: 250.3B parameters × 2 bytes per parameter (fp16) = 500.58 GB.
- No model configuration was supplied, so the KV cache uses the size heuristic for this band: 0.459 MB per token, from extrapolated above 90B — no configuration was fetched for this band.
- KV cache: 0.459 MB per token × 8,192 tokens of context × 4 concurrent requests = 15.03 GB, sized for every user holding a full context at once.
- Overhead: 15% of weights plus KV cache for the runtime, activations and memory fragmentation = 77.34 GB.
- GB means 10⁹ bytes, matching how GPU memory is advertised.
- KV cache held at fp16 (2 bytes per element); quantising weights does not by itself quantise the cache.
- Peak figure, not average: prefix caching and paged attention usually keep real usage lower, while speculative decoding, CUDA graphs and a second resident model push it higher.
- "Concurrent" counts requests generated at the same instant, not people: 4 simultaneous requests is the worst case this estimate is built on — measure yours before buying.
04Hardware profiles
No hardware profile was sized for this answer.
05Hosted providers
No hosted provider has been fetched for this model. OpenRouter’s catalogue is read when our refresh next runs; until then this is empty rather than assumed.
06Deployment stacks
No published deployment stack names this model yet.
07Evidence
- 01–07Tier 4official repository / model cardHugging Face Hub
Hugging Face model card data — upstage/Solar-Open2-250B
https://huggingface.co/api/models/upstage/Solar-Open2-250B
Verification may be outdatedRetrieved 19 Sep 2026sha256:a2ded437f2897 records · · · · · ·
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