GPT-6.1 Terra vs Kimi K3.1 Pro
aka OpenAI GPT-6.1 Terra vs Moonshot AI Kimi K3.1 Pro
- Author picksKimi K3.1 Pro1–0
- CheaperGPT-6.1 Terra6/7 postsmedian gap ~4.9×
- FasterGPT-6.1 Terra8/8 postsmedian gap ~4.1×
As stated in each post, not a controlled benchmark.
Posts
12Four builds each: Argon, Kimi, Terra and Opus: Gemini 4 Argon, Kimi K3.1 Pro, GPT-6.1 Terra, Claude Opus 5.5. Posted by @DanielZambrini.
Lighthouse challenge, Terra vs Kimi K3.1 Pro: GPT-6.1 Terra, Kimi K3.1 Pro. Posted by @LatentOperatorX.
Pelican biking a coast road day to night, three models: GPT-6.1 Terra, Claude Opus 5.5, Kimi K3.1 Pro. Posted by @techfren.
3D supercar, Terra vs Sonnet vs Sol vs Kimi: GPT-6.1 Terra, Claude Sonnet 5.5, GPT-6.1 Sol, Kimi K3.1 Pro. Posted by @marcthecreatorr.
Infinite zoom pelican on a bicycle, three models: GPT-6.1 Terra, Claude Opus 5.5, Kimi K3.1 Pro. Posted by @techfren.
Burning car, Kimi K3.1 Pro vs GPT-6.1 Terra: Kimi K3.1 Pro, GPT-6.1 Terra. Posted by @AskClash.
Mount Doom scene, Kimi K3.1 Pro vs GPT-6.1 Terra: Kimi K3.1 Pro, GPT-6.1 Terra. Posted by @ItsCuthulhu.
Voxel Hogwarts, Kimi K3.1 Pro vs GPT-6.1 Terra: Kimi K3.1 Pro, GPT-6.1 Terra. Posted by @ItsCuthulhu.
Blender axe, five models side by side: GPT-6.1 Terra, GPT-6.1 Sol, Kimi K3.1 Pro, DeepSeek V4.1 Flash 1017, Gemini 4 Argon. Posted by @sshayahmet.
Pixel city skyline, Kimi K3.1 Pro vs GPT-6.1 Terra: Kimi K3.1 Pro, GPT-6.1 Terra. Posted by @AndyL5cc.
Eiffel Tower benchmark, GPT-6.1 Terra debut: GPT-6.1 Terra, GPT-6.1 Sol, Kimi K3.1 Pro, Muse Spark 1.3. Posted by @EnvolDev.
Same prompt, separate runs
5Not a controlled comparison: prompts, tools and time differ.
About this matchup
GPT-6.1 Terra vs Kimi K3.1 Pro in real side-by-side tests: 12 posts from X where both got the same prompt; 9 posts report cost or time. Judge coding ability from the actual outputs.
GPT-6.1 Terra vs Kimi K3.1 Pro: which is better for coding?
Which is better for coding, GPT-6.1 Terra or Kimi K3.1 Pro?
Author picks: where the author preferred one of the two, they picked Kimi K3.1 Pro once and GPT-6.1 Terra never. That covers 1 of the 12 posts here; each post is a different task, so watch the outputs above for the work you care about.
Which is cheaper, GPT-6.1 Terra or Kimi K3.1 Pro?
7 posts state a cost for both: GPT-6.1 Terra was cheaper in 6; Kimi K3.1 Pro in 1 (median gap ~4.9×). These are the costs the posts state for each run, not list prices.
Which is faster, GPT-6.1 Terra or Kimi K3.1 Pro?
8 posts state a time for both: GPT-6.1 Terra was faster in all 8 (median gap ~4.1×). Times are as stated in each post; tools and settings differ between posts.
Summary
GPT-6.1 Terra and Kimi K3.1 Pro appear together in 12 posts on X: satellite Mesh Blackout benchmark, four models in OpenCode (@AlicanKiraz0), four builds each: Argon, Kimi, Terra and Opus (@DanielZambrini), lighthouse challenge, Terra vs Kimi K3.1 Pro (@LatentOperatorX), pelican biking a coast road day to night, three models (@techfren), 3D supercar, Terra vs Sonnet vs Sol vs Kimi (@marcthecreatorr) and 7 more. 7 of them are part of larger lineups with other models. The 5 most-viewed examples: In @EnvolDev's Eiffel Tower benchmark, GPT-6.1 Terra debut, GPT-6.1 Terra was cheaper ($0.44 vs $3.12), as reported in the post. In @marcthecreatorr's 3D supercar, Terra vs Sonnet vs Sol vs Kimi, GPT-6.1 Terra was faster (5 min vs 1 h 15 min), as reported in the post. In @AlicanKiraz0's satellite Mesh Blackout benchmark, four models in OpenCode, GPT-6.1 Terra was cheaper ($0.42 vs $0.85) and faster (10.9 min vs 20.9 min), as reported in the post. In @AndyL5cc's pixel city skyline, Kimi K3.1 Pro vs GPT-6.1 Terra, GPT-6.1 Terra was cheaper ($0.20 vs $1.50) and faster (2 min vs 10 min), as reported in the post. In @AskClash's burning car, Kimi K3.1 Pro vs GPT-6.1 Terra, GPT-6.1 Terra was cheaper ($0.24 vs $0.63) and faster (8.3 min vs 23.8 min) and Kimi K3.1 Pro used fewer tokens (877.3K tokens vs 1.2M tokens), as reported in the post. The table below lists all 9 posts with numbers for both.
What each post reports
Only numbers stated in each post. “—” means the post doesn’t say.
Quick facts
| Model | Vendor | Released | Input $/1M tokens | Output $/1M tokens | Context (tokens) | Official links |
|---|---|---|---|---|---|---|
| GPT-6.1 Terra | OpenAI | 2026-10-26 | Announcement | |||
| Kimi K3.1 Pro | Moonshot AI | 2026-10-23 | 1,000,000 | Tech blog · Announcement |
From the vendors’ official pages, checked 2026-10-26. Standard API list prices; each value links its source and a blank cell could not be verified. The archive’s own numbers above are what each post states.
Who won where
1- Pixel city skyline, Kimi K3.1 Pro vs GPT-6.1 TerraThe poster says Terra was 5x faster at under 1/7 of the cost, but Kimi still looks better overall.— the author’s view, @AndyL5cc (paraphrased)





















