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GPT-5.6 Sol (Official API)

openai·openai/gpt-5.6-sol-official·GA·Closed·gpt-sol series·NEW
Frontier GPT-5.6 model for complex professional work, coding, and agentic workflows

Specs & pricing

Input / output per 1M tokens
Reference price·Infer by Flow7
$2.50 / $12.50
Blended $5.00 · Cache read $0.25
Lowest paid·Infer by Flow7Gateway
$2.50 / $12.50
Blended $5.00
Context
271,999
Output limit
128,000
Knowledge cutoff
2026-02-16
Released / updated
2026-07-09 / 2026-07-09
Capabilities
✓ Reasoning✓ Tool use✓ Structured outputTemperature✓ Attachments
Modalities
TextImagePDF

Available at 1 providers1 with public prices

ProviderTierInputOutputCache readCache writeContextOutput limitStatus
Infer by Flow7
infer/gpt-5.6-sol:official
Gateway$2.50$12.50$0.25$3.13271,999128,000

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.

Reasoning control

effort = noneeffort = loweffort = mediumeffort = higheffort = xhigheffort = max

Your usage cost

1Infer by Flow7$855.00
The cheapest paid channel is the only channel.

Price historyone sample accumulated per data sync

Input list $2.50Output list $12.50Min blended $5.00

Price history accumulates from each data sync; currently only 1 sample(s) (2026-09-15). Each future sync adds a point, and once accumulated a line is drawn here.

Related models

GPT-6.1 Solsame series$2.00 / $10.00Agentic Chat (GPT-6.1 Sol)same series$0 / $0GPT-6.1 Sol (EU)same series$2.40 / $12.00GLM-5.2cheaper alternative$1.40 / $4.40GLM-5.3cheaper alternative$1.40 / $4.40GLM-5.3-Flashcheaper alternative$0.15 / $0.50DeepSeek V4.1 Flashcheaper alternative$0.15 / $0.60
Data partly from models.dev (MIT) · Infer by Flow7 official docs ↗