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Measured harness ledgerPublic result
GPT-5.6 Terra

Explorable space-flight game — GPT-5.6 Terra Ultra

Build a responsive browser space-flight game with flight controls, a coherent star-system environment, lighting, assets, and a playable game loop.

Ultra reasoningHeadline result
Workflow cost
$1.44
Wall-clock
16:51.4 wall-clock
Processed tokens
2.31M processed
Record state
partial_token_timing_and_source_ledger
Public summary

GPT-5.6 Terra Ultra partial_token_timing_and_source_ledger ledger: 16:51.4 wall-clock, 2.31M processed, and $1.44 API-equivalent estimate, not a subscription invoice.

Run identity and stack
  • Result ID: space-flight-game-gpt-5.6-terra-ultra
  • Technical model: gpt-5.6-terra
  • Provider: OpenAI Codex
  • Stack: OpenAI Codex
  • Stack: Technical model/configuration: gpt-5.6-terra
  • Stack: Three.js / Vite game
  • Stack: Generated spaceship assets
  • Stack: Harness v1 space-flight prompt
Cost basis
  • Requests with more than 272,000 input tokens use long-context pricing; all 39 supplied calls were short-context.
  • Separately priced tools and non-token services are excluded.
Primary artifact integrity
  • Kind: threejs-space-flight-game-primary-source
  • Path: artifacts/space-flight-game-gpt-5.6-terra-ultra/source/src/main.js
  • SHA-256: 02cd225d2db95b73ec348cd93380a70ca5e924951188bbe2c7d7213d01504465
Recorded caveats
  • Wall-clock is end-to-end latency, not model-only compute; it includes tool time and idle gaps between user turns.
  • Output tokens include hidden reasoning, visible prose/code, and tool-call JSON.
  • Cached input is deeply discounted, so total processed tokens overstate cost.
  • This is an API-equivalent estimate rather than the actual charge for a subscription-backed Codex session.
  • Separately priced tools and non-token services are excluded.
  • Cache-creation tokens are zero because the Codex transcript schema does not expose a cache-write field.
  • Subagent logs are excluded to avoid double-counting inherited parent context.
Visible evidence gaps
  • browser and hardware environment
  • local FPS
  • final capture
  • blind-evaluation record
Builder test available

This result is part of a Builder test. Open it for the exact prompt and any released projects, RemakeBench Harness workflows and production skills. Public proof and known evidence gaps stay visible here.

  • Tech Review 001 · v1
View Tech Review 001 · v1Return to GPT-5.6 Terra
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