Claude Sonnet 5.5 vs GPT-6.1 Terra
aka Sonnet 5.5 vs OpenAI GPT-6.1 Terra
- Author picksClaude Sonnet 5.51–0
- CheaperGPT-6.1 Terra5/5 postsmedian gap ~36×
- FasterGPT-6.1 Terra5/5 postsmedian gap ~10×
As stated in each post, not a controlled benchmark.
Posts
21Cinematic cruise ship at sea, three models: DeepSeek V4.1 Flash 1017, Claude Sonnet 5.5, GPT-6.1 Terra. Posted by @jpshrodinger.
Light-cycle bot duel, Sonnet vs Terra: Claude Sonnet 5.5, GPT-6.1 Terra. Posted by @ashishkaloge.
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.
Miniature Japanese village, Terra vs Sonnet: GPT-6.1 Terra, Claude Sonnet 5.5. Posted by @itsfazley.
Three.js scene rebuild, five models ranked: Claude Opus 5.5, GPT-6.1 Sol, Claude Sonnet 5.5, GPT-6.1 Terra, Gemini 4 Argon. Posted by @itsgarycheung.
3D big sea fish, three models: Claude Opus 5.5, Claude Sonnet 5.5, GPT-6.1 Terra. Posted by @jpshrodinger.
Blender trebuchet, GPT-6.1 Terra against earlier builds: GPT-6.1 Terra, GPT-6.1 Sol, Claude Sonnet 5.5. Posted by @eridots.
One-shot Star Fox game, GPT-6.1 Terra vs Claude Sonnet 5.5: GPT-6.1 Terra, Claude Sonnet 5.5. Posted by @BeauJohnson89.
Rube Goldberg bell machine, two mid-tier models: Claude Sonnet 5.5, GPT-6.1 Terra. Posted by @kairox36.
Exploded view, GPT-6.1 Terra vs Claude Sonnet 5.5: GPT-6.1 Terra, Claude Sonnet 5.5. Posted by @exploraX_.
WebGPU jelly dam diorama, Claude Sonnet 5.5 vs GPT-6.1 Terra: Claude Sonnet 5.5, GPT-6.1 Terra. Posted by @daveeyyy_.
Entering six invoices by computer use, three models: GPT-6.1 Terra, GPT-6.1 Sol, Claude Sonnet 5.5. Posted by @invest_morgan.
Four ducks from one prompt, four models: GPT-6.1 Terra, GPT-6.1 Sol, Claude Sonnet 5.5, Claude Opus 5.5. Posted by @aiRobertDaily.
Three.js galloping zebra, three models: GPT-6.1 Terra, Claude Sonnet 5.5, Claude Haiku 5.5. Posted by @AI_Screening.
Miami night ride, Claude Sonnet 5.5 vs GPT-6.1 Terra: Claude Sonnet 5.5, GPT-6.1 Terra. Posted by @Im_pritam18.
Pelican SVG with GPT-6.1 Terra at two effort levels: GPT-6.1 Terra, DeepSeek V4.1 Flash 1017, Claude Sonnet 5.5. Posted by @xiangxiang103.
Snowman in a snowy forest, Sonnet vs Terra: Claude Sonnet 5.5, GPT-6.1 Terra. Posted by @ivanainai.
Kangaroo riding a bike upside down in SVG: GPT-6.1 Terra, Claude Sonnet 5.5. Posted by @leo114119.
Pickle rocket launching from a jar in Minecraft: GPT-6.1 Terra, GPT-6.1 Sol, Claude Sonnet 5.5. Posted by @jan_volad.
Candy obstacle-course platformer, Terra vs Sonnet: GPT-6.1 Terra, Claude Sonnet 5.5. Posted by @notjazii.
Same prompt, separate runs
5Not a controlled comparison: prompts, tools and time differ.
About this matchup
Claude Sonnet 5.5 vs GPT-6.1 Terra in real side-by-side tests: 21 posts from X where both got the same prompt; 9 posts report cost or time. Judge coding ability from the actual outputs.
Sonnet 5.5 vs GPT-6.1 Terra: which is better for coding?
Which is better for coding, Sonnet 5.5 or GPT-6.1 Terra?
Author picks: where the author preferred one of the two, they picked Claude Sonnet 5.5 once and GPT-6.1 Terra never. That covers 1 of the 21 posts here; each post is a different task, so watch the outputs above for the work you care about.
Which is cheaper, Sonnet 5.5 or GPT-6.1 Terra?
5 posts state a cost for both: GPT-6.1 Terra was cheaper in all 5 (median gap ~36×). These are the costs the posts state for each run, not list prices.
Which is faster, Sonnet 5.5 or GPT-6.1 Terra?
5 posts state a time for both: GPT-6.1 Terra was faster in all 5 (median gap ~10×). Times are as stated in each post; tools and settings differ between posts.
Summary
Claude Sonnet 5.5 and GPT-6.1 Terra appear together in 21 posts on X: event horizons, Claude Sonnet 5.5 vs GPT-6.1 Terra (@nabendu82), cinematic cruise ship at sea, three models (@jpshrodinger), light-cycle bot duel, Sonnet vs Terra (@ashishkaloge), 3D supercar, Terra vs Sonnet vs Sol vs Kimi (@marcthecreatorr), miniature Japanese village, Terra vs Sonnet (@itsfazley) and 16 more. 10 of them are part of larger lineups with other models. The 5 most-viewed examples: In @notjazii's candy obstacle-course platformer, Terra vs Sonnet, GPT-6.1 Terra was cheaper ($1.00 vs $18.00) and faster (10 min vs 1 h 30 min), 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 29 min), as reported in the post. In @jan_volad's pickle rocket launching from a jar in Minecraft, GPT-6.1 Terra was cheaper ($0.12 vs $4.91) and faster (2.6 min vs 32.8 min), as reported in the post. In @jpshrodinger's 3D big sea fish, three models, GPT-6.1 Terra was cheaper ($0.03 vs $0.16), as reported in the post. In @daveeyyy_'s WebGPU jelly dam diorama, Claude Sonnet 5.5 vs GPT-6.1 Terra, GPT-6.1 Terra was cheaper ($0.09 vs $15.00) and faster (3 min vs 2 h), as reported in the post. The table below lists all 6 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 |
|---|---|---|---|---|---|---|
| Claude Sonnet 5.5 | Anthropic | 2026-09-28 | $2 | $10 | 1,000,000 | Model docs |
| GPT-6.1 Terra | OpenAI | 2026-10-26 | 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
2- Three.js galloping zebra, three modelsThe poster says Claude keeps cooking even in the mid tier and Haiku feels better than GPT-6.1 Terra.— the author’s view, @AI_Screening (paraphrased)
- Miami night ride, Claude Sonnet 5.5 vs GPT-6.1 TerraThe poster says Claude Sonnet 5.5 cooked Terra.— the author’s view, @Im_pritam18 (paraphrased)
Prompts shown in the posts
Generate an animated SVG of a pelican riding a bicycle — @xiangxiang103





























