GPT-5.6 Sol
RestrictedClosed
OpenAI's GPT-5.6 flagship, available in limited preview through the OpenAI API and Codex for approved organizations.
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Context
1.1M
Input
$5
/1M tok
Output
$30
/1M tok
Blended
$11.25
#441/ 454/1M · 3:1
Speed
78
#68/ 454tok/s
Cache read
$0.20
0.04x input
Cache write
$2.50
0.50x input
Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter
| Reasoning effort | Index | Speed |
|---|---|---|
| max | 60.9 | 78 t/s |
| xhigh | 59.0 | 70 t/s |
| high | 57.3 | 61 t/s |
| medium | 55.6 | 54 t/s |
| low | 50.7 | 60 t/s |
| Non-reasoning | 41.9 | 59 t/s |
Intelligence Index per reasoning-effort setting, via Artificial Analysis · pricing identical across tiers
Reported on 21 evals across 12 domains - best 87.0% on Creative Story-Writing Benchmark · #5 of 42
Reported eval scores
21IFBench66.5
Vals Index63.7
SAGE52.6
SciCode47.1
MedScribe85.2
MedCode44
TaxEval v274.8
CorpFin v264.4
MortgageTax67.3