OpenAI

Large language model

GPT-5.6 Sol

FrontierProprietaryReasoningProprietary
Try in Playground →API Docs →
Input Price
$4.00
/M tokens
Output Price
$20.00
/M tokens
Intelligence
47
/100
Arena Rank
#17
Overall
Coding Rank
#5
Arena
Context
1.05M
tokens

Verdict

One9Founders Verdictfair

OpenAI's July 2026 high SKU. Intelligence 47 on Index v4.3, now behind Astra. List $4/$20. Still a strong ChatGPT-shaped workhorse; Astra is the new ceiling.

“OpenAI's previous flagship. Use unless you need Astra.”

Best For

  • ✓hard reasoning
  • ✓math/science
  • ✓ChatGPT-aligned UX

Not Great For

  • ✗cost-sensitive volume
  • ✗long prompts without watching the surcharge

Startup Recommendation

Use Sol for hard tasks; Terra/Luna for volume.

Pricing Details

Input
$4.00
per 1M tokens
Output
$20.00
per 1M tokens
Cached Input
$0.40
per 1M tokens
Batch Input
$2.00
per 1M tokens

Capabilities

✓Function Calling
✓Structured Output
✓Vision
-Web Search
-Code Execution
-MCP
✗Audio Input
✗Video Input
✓Reasoning
✓Streaming
-Batch API
-Computer Use

Chatbot Arena Rankings

Overall
#17
Coding
#5

Security & Compliance

✓SOC 2 Type II
✓GDPR
✓HIPAA
✓Enterprise SSO
✓Audit Logs

Training data policy: API data not used for training by default (opt-out / ZDR available)

DPDP Act (India): No India-resident inference by default. Use DPA + region controls.

Data residency: US, EU

India Availability

API available globally

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