Upstage · Chat and reasoning · 250B parameters · 15B active · upstage-solar-license
Solar Open2 250B
Needs 331 GB at FP8 / INT8. The smallest real configuration today is 8× RTX A6000 at Lium, $3.36 per hour, about $2,453 a month at 730 hours.
Parameters250B15B active per token
Context1M tokensmaximum published
Checkpoint501 GBBF16, as published
Released—documented date
Smallest configuration · FP8 / INT8
8× RTX A6000384 GB VRAM · 86% used
- Per hour
- $3.36
- Per month
- $2,453
- Cheapest at
Lium
Memory · 3 precisions · 6 context lengthsHow much VRAM it needs
Weights plus runtime overhead, then the KV cache that grows with the context you serve.
| Precision | Weights | Weights + headroom | 4k context | 32k context | 128k context | 256k context | 1M context |
|---|---|---|---|---|---|---|---|
| BF16published checkpoint | 501 GB | 601 GB | 602 GB | 608 GB | 627 GB | 653 GB | 807 GB |
| FP8 / INT8published checkpoint | 275 GB | 331 GB | 332 GB | 337 GB | 357 GB | 382 GB | 537 GB |
| INT4 / MXFP4published checkpoint | 160 GB | 193 GB | 194 GB | 199 GB | 218 GB | 244 GB | 399 GB |
| KV cacheone sequence, FP16 cache, included above | — | — | 1 GB | 7 GB | 26 GB | 52 GB | 207 GB |
Cross-checked on Hugging Face Oct 28, 2026: 250.3B parameters in the safetensors headers, 500.6 GB of weight files, attention layout from config.json (48 layers, 8 KV heads × 128). Method: weights as published at the native precision, verified on Hugging Face 2026-10-28; other precisions estimated at 1 (8-bit) and 0.6 (4-bit) bytes per parameter; × 1.2 runtime headroom; KV cache = 4096 bytes per token per layer × 48 full-attention layers (FP16 cache, one sequence).config.json ↗
Smallest configuration per GPU · 110 GPUs · cheapest eligible on-demand offer per GPU count, every provider on fileWhat it costs to run, GPU by GPU
The fewest GPUs of one type whose total memory fits the model at short context, priced from the cheapest eligible on-demand offer for exactly that count (45-day window, newest reading per provider), with the next providers beside it. Monthly = 730 hours.
| GPU | Smallest config | VRAM used | $ / hour | $ / month | Cheapest at |
|---|---|---|---|---|---|
| RTX A6000Best fit | 8× 48 GB384 GB total | 86% | $3.36 | $2,453 | LiumTrust 40 · read Nov 1 · receipt · also LeaderGPU $3.58, GPU.ai $3.76 |
| L40S | 8× 48 GB384 GB total | 86% | $3.74 | $2,727 |  Vast.aiTrust 78 · read Nov 1 · receipt · also Lium $6.00, GPU.ai $6.40 |
| RTX PRO 6000 | 4× 96 GB384 GB total | 86% | $3.84 | $2,805 | Vast.aiTrust 78 · read Nov 1 · receipt · also UpCloud $3.89, Hetzner $6.44 |
| Gaudi 2 | 4× 96 GB384 GB total | 86% | $4.18 | $3,052 |  Cyfuture AInot scored · read Nov 1 · receipt |
| A40 | 8× 48 GB384 GB total | 86% | $4.61 | $3,364 |  LeaderGPUTrust 59 · read Nov 1 · receipt · also Exoscale $8.36 |
| RTX 6000 Ada | 8× 48 GB384 GB total | 86% | $5.20 | $3,796 |  GPU.ainot scored · read Nov 1 · receipt · also io.net $5.46, QuantaCloud $6.21 |
| MI300X | 2× 192 GB384 GB total | 86% | $5.71 | $4,167 | Cyfuture AInot scored · read Nov 1 · receipt · also Hot Aisle $5.98, AtmosCompute $6.69 |
| MI325X | 2× 256 GB512 GB total | 65% | $6.21 | $4,536 | Cyfuture AInot scored · read Nov 1 · receipt |
| B200 | 2× 180 GB360 GB total | 92% tight | $8.22 | $6,002 |  UpCloudTrust 75 · read Nov 1 · receipt · also Deep Infra $9.78, Elice AI Cloud $13.64 |
| L40 | 8× 48 GB384 GB total | 86% | $8.40 | $6,132 |  OblivusTrust 82 · read Nov 1 · receipt · also CoreWeave $10.00, AtmosCompute $12.21 |
| A100 80GB | 8× 80 GB640 GB total | 52% | $9.82 | $7,166 | Edgevananot scored · read Nov 1 · receipt · also GPU.ai $10.00, io.net $10.50 |
| RTX PRO 6000D | 4× 84 GB336 GB total | 98% tight | $10.56 | $7,709 | AtmosComputenot scored · read Nov 1 · receipt |
| H200 NVL | 4× 141 GB564 GB total | 59% | $10.67 | $7,788 | Vast.aiTrust 78 · read Nov 1 · receipt · also IONOS $13.04, Geodd $13.56 |
| H200 | 4× 141 GB564 GB total | 59% | $11.05 | $8,070 | Vast.aiTrust 78 · read Nov 1 · receipt · also Theta EdgeCloud $14.76, Canopy Wave $16.00 |
| B300 | 2× 288 GB576 GB total | 57% | $11.65 | $8,506 | UpCloudTrust 75 · read Nov 1 · receipt · also FPT AI Factory $13.98, Vast.ai $17.00 |
| H100 NVL | 4× 94 GB376 GB total | 88% | $12.48 | $9,112 | Vast.aiTrust 78 · read Nov 1 · receipt · also EmpirioLabs AI $22.40, Open Telekom Cloud $25.90 |
| H100 | 8× 80 GB640 GB total | 52% | $13.67 | $9,982 |  GcoreTrust 80 · read Nov 1 · receipt · also Lium $14.36, Airon AI $15.04 |
| B200 CC | 2× 180 GB360 GB total | 92% tight | $18.09 | $13,206 |  VerdaTrust 81 · read Nov 1 · receipt |
| MI355X | 8× 288 GB2304 GB total | 14% | $23.60 | $17,228 |  TensorWaveTrust 64 · read Nov 1 · receipt |
| GB300 | 2× 288 GB576 GB total | 57% | $26.11 | $19,060 | VerdaTrust 81 · read Nov 1 · receipt |
| B300 CC | 4× 288 GB1152 GB total | 29% | $46.31 | $33,806 | VerdaTrust 81 · read Nov 1 · receipt |
| A800 80GB PCIe | 8× 80 GB640 GB total | 52% | $50.80 | $37,088 |  Volcano Enginenot scored · read Nov 1 · receipt |
Throughput estimates · Oct 4, 2026Tokens per second, and what a million costs
Chat and reasoning. Speed estimated from memory bandwidth and model size, never measured. The cost per 1M output tokens is an estimate at the prices read on Oct 4, 2026; it is not recomputed here.
| GPU | Cards | Precision | tok/s per user | per 1M output tokens · estimate |
|---|---|---|---|---|
| MI300X | 2 | FP8 | 60.9 | $0.918 |
| B200 | 2 | FP8 | 106 | $1.22 |
| H100 SXM | 4 | FP8 | 63.8 | $1.58 |
| H200 | 4 | FP8 | 67.3 | $1.62 |
| RTX PRO 6000 | 4 | FP8 | 39.6 | $2.05 |
| H100 PCIe | 4 | FP8 | 38.0 | $2.30 |
| L40S | 8 | FP8 | 27.3 | $2.74 |
| A100 80GB | 8 | BF16 | 40.9 | $2.79 |
cards, precision and speed estimated from memory bandwidth and model size; cost recomputed by the site from verified prices · cheapest per output at the prices of Oct 4, 2026: MI300XWhy estimates, and their limits →
Solar Open2 250B · related