CLAUDE VS GPT · IN ONE TELEGRAM CHAT
Claude vs GPT: decide on your task, not a leaderboard
Both families are live in @vustbot — Claude Sonnet 5, Claude Opus 4.8 and Claude Fable 5 next to GPT-5.6 Luna, Terra and Sol. Ask one model, switch, then ask the other to answer the same task — and keep the better reply.
Direct answer
There is no single winner — pick per task
Both are frontier families and the right one depends on the task, your style and your budget. The honest comparison is putting your own prompt to both in one thread — ask one, switch, then ask the other the same thing — instead of reading someone else's benchmark. That is exactly what @vustbot is built for.
The two families in VUST today
In VUST today
Claude family
Claude Sonnet 5 · Claude Opus 4.8 · Claude Fable 5 · Claude Opus 5 (manual preview)
GPT family
GPT-5.6 Luna · GPT-5.6 Terra · GPT-5.6 Sol
Included from Free/Core
Claude family
Claude Sonnet 5 (Core)
GPT family
GPT-5.6 Luna (Free) · GPT-5.6 Terra (Core)
Pro flagships
Claude family
Claude Opus 4.8 · Claude Fable 5 · Claude Opus 5 (manual preview)
GPT family
GPT-5.6 Sol
Usually reach for
Claude family
Coding, structured analysis, high-stakes work; Opus 4.8 also covers research and long documents
GPT family
Luna for everyday speed; Terra for analysis and coding; Sol for the hardest, highest-stakes tasks
Beyond a plan
Same rule for both: outside a plan or over an allowance, the bot shows the exact one-shot Balance option before the run — the prompt is kept, nothing is charged before you confirm.
Uncertainty
No head-to-head product-quality benchmark is claimed. Fit varies by task and prompt; the catalog composition can change — this page states the checked date above.
Ask, switch, ask again — how it works
Ask the first model
Send your real question — a refactor, a rewrite, a decision — and get the first family's answer, labeled with its model.
Switch models, then ask again
Switching only changes which model will answer next; it does not resend your previous prompt. Ask again yourself, or ask the newly selected model to answer or reassess the same task — the thread's earlier context can still be there to reference. No copy-paste between apps.
Keep the better answer
Judge on your own criteria. For consequential decisions, cross-check with a third model or the Council of Sages.
One free tier, one wallet — no second subscription to compare the families. Selecting another model has no separate fee of its own; what counts is each answer you request. Every run follows your normal plan allowance or, when Balance is needed, starts only after you confirm the exact price — so two answers are two runs, not one. Gemini, Grok, DeepSeek, Kimi, Qwen and more can join the same thread; the full catalog lives at /models.
Comparison basis
Comparison basis
Model names are shown as marketed by each vendor. VUST availability, plans and limits come from the runtime catalog, checked 2026-07-26. VUST claims no partnership and no universal model superiority.
Unless a separate method is stated above, this page does not claim a head-to-head product-quality benchmark.
Checked: 2026-07-26
Copyable summary
Citable summary (checked 2026-07-26): @vustbot runs both families today in one Telegram chat — Claude Sonnet 5, Opus 4.8, Fable 5 and manual-preview Opus 5; GPT-5.6 Luna, Terra and Sol. You ask one model, switch, then ask the other to answer the same task; switching itself never re-runs your previous prompt. Every reply is labeled with the model that produced it, each answer is its own run under your plan allowance or an explicitly confirmed Balance price, and no universal winner is claimed.Open @vustbot and ask the first model
Frequently asked questions
Which exact models am I comparing?
On the Claude side: Sonnet 5 (Core), Opus 4.8 and Fable 5 (Pro), plus Opus 5 as a manual preview. On the GPT side: GPT-5.6 Luna (Free default), Terra (Core) and Sol (Pro). Every reply is labeled with the model that produced it.
Does switching models re-run my last question?
No. Switching the selected model only changes which model will answer next — it does not resend your previous prompt. Ask again yourself, or ask the newly selected model to answer or reassess the same task; the earlier thread context can still be there to reference.
Do I need two subscriptions?
No — one bot, one wallet, and switching the selected model itself has no separate fee. What counts is each answer you request: every run follows your normal plan allowance or, when Balance is needed, starts only after you confirm the exact price. Two answers are two runs, not one.
Which is better, Claude or GPT?
It depends on the task. Ask one, switch, then ask the other the same thing in the same thread and keep the better answer — that beats reading someone else's leaderboard.
Can I bring Gemini or Grok into the comparison?
Yes — the full catalog at /models includes Gemini, Grok, DeepSeek, Kimi, Qwen and more, all switchable in the same chat.