Harness comparisonAI Coding
Three.js night scene in three labs’ agents — Claude Code (Claude Fable 5.1) vs OpenAI Codex (GPT-6 Astra) vs DeepSeek Harness (DeepSeek V4.1 Flash 1017)
Scoreboard3
- Claude Fable 5.1AnthropicClaude Code
- Time
- 4.9 min
- Cost
- $2.05
- GPT-6 AstraOpenAIOpenAI Codex
- Time
- 112 s
- Cost
- $0.55
- DeepSeek V4.1 Flash 1017DeepSeekDeepSeek Harness
- Time
- 22.7 min
- Cost
- $0.14
- medium confidence
- Cheapest, slowest by far
- Written “V4.1 Flash” in a post after the 2026-10-17 upgrade; mapped to DeepSeek V4.1 Flash 1017.
Prompt
Three.js night scene in three labs’ agentsThe post doesn’t quote the prompt wording.
Same three.js night scene, one run each: Claude Code with Claude Fable 5.1 (4:54, $2.05), Codex with GPT-6 Astra (1:52, $0.55) and DeepSeek Harness with DeepSeek V4.1 Flash 1017 (22:42, $0.14).
Each side pairs a coding harness with its own model, so harness and model differences are mixed. More Claude Code vs OpenAI Codex. More OpenAI Codex vs DeepSeek Harness. More Claude Code vs DeepSeek Harness. All harness comparisons.
The post, itemised
- Task
- Three.js night scene in three labs’ agents
- Category
- 3D & Shaders
- Mode
- Not stated
- Posted
- Video length
- 20 s
- Likes
- 4
- Views
- 213
- Bookmarks
- 0
- Sponsored
- No
Cost & time, as stated in the postAs stated: Claude Code 4:54, $2.05; Codex 1:52, $0.55; DeepSeek Harness 22:42, $0.14.
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