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GPT-5.6 Sol
openai·openai/gpt-5.6-sol·BETA·Closed·gpt-sol series·NEW
Frontier GPT-5.6 model for complex professional work, coding, and agentic workflows
At a glance
Official price$5.00 / $30.00 per 1M
Cache read $0.50 · OpenAI
Lowest paid$1.50 / $12.00
Xpersona Gateway · 4.2× spread
1 more $0 channels
Context1,050,000
⚠ Providers report 372,000–1,050,000; the table below is authoritative
Output limit128,000
Capabilities
✓ Reasoning✓ Tool use✓ Structured outputTemperature✓ Attachments
Modalities
TextImagePDF
Knowledge cutoff2026-02-16
Released / updated2026-07-09 / 2026-07-09
Quality & performanceArtificial Analysis · Intelligence Index v4.1 · rep. tier max
Intelligence60.9
Value15
Coding77.4
Agentic57.8
Output speed65 tok/s
TTFT208.71 s
Cost per task$1.2312
Value formulaIQ 60.9 ÷ min blended $4.125 = 15
Reasoning tier → intelligence / speed (higher tier = stronger but slower)
Non-reasoningIQ 41.9 · 59 tok/s
lowIQ 50.7 · 57 tok/s
mediumIQ 55.6 · 63 tok/s
highIQ 57.3 · 63 tok/s
xhighIQ 59 · 63 tok/s
maxIQ 60.9 · 65 tok/s
Quality is independently evaluated by Artificial Analysis. Speed/latency are model-level medians.
Available at 34 providers32 with public prices · 1 free
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| Kenari gpt-5-6-sol | Gateway | Free | — | — | 1,050,000 | 128,000 | ||
| Xpersona | Gateway | $1.50 | $12.00 | $0.15 | — | 372,000 ⚠ | 128,000 | |
| NanoGPT | Gateway | $2.50 | $15.00 | $0.25 | $3.13 | 1,050,000 | 128,000 | |
| OpenRouter | Gateway | $2.50 tiered >272K: $5.00 | $15.00 | $0.25 | $3.13 | 1,050,000 | 128,000 | |
| routing.run | Gateway | $2.50 | $15.00 | — | — | 1,000,000 ⚠ | 128,000 | |
| Ofox | Gateway | $2.50 | $15.00 | $0.25 | $3.13 | 1,050,000 | 128,000 | |
| Vercel AI Gateway | Cloud | $2.50 | $15.00 | $0.25 | $3.13 | 1,050,000 | 128,000 | |
| Requesty | Gateway | $4.50 tiered >272K: $9.00 | $27.00 | $0.45 | — | 1,050,000 | 128,000 | |
| AI-ROUTER | Gateway | $5.00 | $30.00 | $0.50 | $6.25 | 1,050,000 | 128,000 | |
| Impossibl | Gateway | $5.00 tiered >272K: $10.00 | $30.00 | $0.50 | $6.25 | 1,050,000 | 128,000 | |
| OpenAIOfficial | First-party | $5.00 tiered >272K: $10.00 | $30.00 | $0.50 | $6.25 | 1,050,000 | 128,000 | |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1Xpersona$738.00
2NanoGPT$980.00
3OpenRouter$980.00
4Ofox$980.00
5Vercel AI Gateway$980.00
6routing.run$1,250.00
12OpenAI · Official$1,960.00
1 more channels offer $0 (Kenari); free tiers usually have rate limits and no SLA, excluded from ranking.
Switch to Xpersona to save $1,222.00/mo (62%)
Note: this is a gateway; verify availability and rate limits yourself.
Benchmark12 items
| Name | Conditions | Score | Metric | Source |
|---|---|---|---|---|
| SWE-Bench Pro | — | 64.6 | resolve rate | Source ↗ |
| Terminal-Bench | v2.1 | 88.8 | success rate | Source ↗ |
| DeepSWE | v1.1 | 72.7 | resolve rate | Source ↗ |
| GPQA Diamond | — | 94.6 | accuracy | Source ↗ |
| FrontierMath | dataset: Tier 1-3 · vv2 | 89 | accuracy | Source ↗ |
| BrowseComp | — | 90.4 | accuracy | Source ↗ |
| OSWorld | v2.0 | 62.6 | success rate | Source ↗ |
| MMMU Pro | variant: no tools | 83 | accuracy | Source ↗ |
| Agents' Last Exam | — | 52.7 | — | Source ↗ |
| Toolathlon | — | 58 | success rate | Source ↗ |
| Artificial Analysis Intelligence Index | variant: max · v4.1 | 58.9 | index score | Source ↗ |
| Artificial Analysis Coding Agent Index | harness: Codex · variant: max · v1.1 | 80 | index score | Source ↗ |
The same benchmark scores very differently across harness / dataset, so the qualifying conditions must be shown together.
Reasoning control
effort = noneeffort = loweffort = mediumeffort = higheffort = xhigheffort = maxbudget_tokenseffort = minimal
2 / 34 providers expose no reasoning control (reasoning_options: []).
Experimental modes2 items
| Mode | Provider | Input | Output | Cache read | Cache write |
|---|---|---|---|---|---|
| fast | OpenAI | $10.00 | $60.00 | $1.00 | $12.50 |
| pro | OpenAI | — | — | — | — |
Related models
GPT-5.6 Sol Prosame series$6.25 / $37.50GPT-5.6same series$5.00 / $30.00GPT-5.6 Sol (Global)same series$5.50 / $33.00GLM-5.2cheaper alternative$1.40 / $4.40DeepSeek V4 Procheaper alternative$0.435 / $0.87DeepSeek V4 Flashcheaper alternative$0.14 / $0.28Kimi K3cheaper alternative$3.00 / $15.00
Price historyone sample accumulated per data sync
Input listOutput listMin blended