GPT-5.6 Sol vs GPT-5.6 Terra: pricing, Quality, Value, and benchmarks

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Pricing, app access, and Conversation Value

• Humanity's Last Exam

  Normalized quality input

  49.5%

  Artificial Analysis GPT-5.6 Sol max analysis page | Independent Artificial Analysis HLE result for the max-reasoning model variant. Treat as tier-3 provisional evidence and do not describe it as OpenAI-published no-tools HLE.

• AA-Omniscience

  AA-Omniscience Index

  21.7

  Artificial Analysis AA-Omniscience evaluation | Independent Artificial Analysis result for GPT-5.6 Sol (max). Display-only; this row does not affect Quality or Value scores.

• SWE-Bench Pro

  Normalized quality input

  64.6%

  OpenAI GPT-5.6 release | OpenAI official GPT-5.6 launch table. Results are vendor-reported and must retain the named model tier, reasoning setting, benchmark version, and harness caveats.

• Terminal-Bench 2.1

  Agentic terminal task completion

OpenAI’s flagship for complex professional work and coding, at premium API pricing.

GPT-5.6 Sol is OpenAI’s flagship tier for complex coding and professional work. Its strong independent HLE and official SWE-Bench Pro evidence come with the family’s highest API price, so it is best reserved for work that justifies maximum capability.

The balanced GPT-5.6 option for everyday work, trading some peak capability for lower cost.

GPT-5.6 Terra is the balanced tier for everyday professional and coding workloads. It gives up some peak performance versus Sol in exchange for lower token pricing, making it the practical default when both capability and cost matter.