Harness comparisonAI Coding
WebGL block game with no engine, two agents — OpenAI Codex (GPT-6 Astra) vs Claude Code (Claude Opus 5.5)
Scoreboard2
- GPT-6 AstraOpenAIOpenAI Codex
- Time
- 6.6 min
- Cost
- $0.80
- Effort medium
- Claude Opus 5.5AnthropicClaude Code
- Time
- 26.7 min
- Cost
- $3.35
- Effort medium
WebGL block game with no engine, two agentsThe post doesn’t quote the prompt wording.
GPT-6 Astra in Codex and Claude Opus 5.5 in Claude Code, both on medium effort, build the same 3D block game in pure WebGL with no engine.
Each side pairs a coding harness with its own model, so harness and model differences are mixed. More Claude Code vs OpenAI Codex. All harness comparisons.
The post, itemised
- Task
- WebGL block game with no engine, two agents
- Category
- Games
- Mode
- Not stated
- Posted
- Video length
- 21.6 s
- Likes
- 0
- Views
- 3
- Bookmarks
- 0
- Sponsored
- No
Cost & time, as stated in the postAs stated: Astra 6 min 36 s, est. $0.80; Claude 26 min 41 s, est. $3.35.
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