OpenAI

GPT-5.6 Luna

Near-FrontierProprietaryReasoningProprietary
Input Price
$0.20
/M tokens
Output Price
$1.20
/M tokens
Intelligence
38
/100
Arena Rank
#65
Overall
Context
1.05M
tokens

One9Founders Verdictexcellent

Cheapest GPT-5.6. $0.20/$1.20 with Intelligence 38. GLM-5.3 Flash is smarter and cheaper if you can leave OpenAI.

“The OpenAI bargain bin, still actually smart.”

Best For

  • ✓high-volume classification
  • ✓cheap tool calling
  • ✓bootstrapped OpenAI stacks

Not Great For

  • ✗frontier coding agents
  • ✗long agentic jobs

Startup Recommendation

Best OpenAI option for bootstrapped volume.

Pricing Details

Input
$0.20
per 1M tokens
Output
$1.20
per 1M tokens
Cached Input
$0.02
per 1M tokens
Batch Input
$0.10
per 1M tokens

Free tier available

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
#65

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