A studio for thinking with AI

The thinking is yours.The models do the typing.

Set your instructions once. Pick a model per question. Branch when an answer deserves another look. Everything stays in one place — including the answer you almost kept.

6
minds
10
daily, free
1
instruction set
  • Instructions that travel
  • Branch instead of overwrite
  • Files, vision, search
model workbench
Attached: product-spec.pdfread
Ask a sharper question, then keep both answers.
6 modelsInstructions10 free / day

Live thread

Choose the right model for the next turn.

branchable
  • Claude Opus 4.7
    Anthropicpro
  • GPT-5.4 mini
    OpenAIfree
  • Claude Sonnet 4.6
    Anthropicfree
  • o4-mini
    OpenAIfree
  • Claude Haiku 4.5
    Anthropicfree
  • GPT-4.1
    OpenAIpro

· Both labs, six minds ·

OpenAI
  • GPT-5.4 mini
  • GPT-4.1
  • o4-mini
Anthropic
  • Claude Opus 4.7
  • Sonnet 4.6
  • Haiku 4.5

Practice

The model isn't the work. The thinking around it is.

The useful part of AI work is rarely the first answer. It's the second attempt, the model switch, the context you keep carrying, and the branch you can return to when a better line of thinking appears.

oran.chat is the room around that loop. Instructions stay attached. Files travel with the thread. Answers split into branches. The model picker is always one turn away. Less ceremony — more attention on the work.

A quieter place to think.

Instruments

Control the context. Compare the answers.

Each feature carries one practical loop: instruct, ask, switch, branch, attach, continue. The studio handles what travels between turns.

01 / context

Custom instructions that stay in the room.

Set your voice, your stack, your constraints, your preferences — once. They prepend every chat and follow every model switch. Your working style doesn't reset when you change advisors.

System promptEvery chatEvery modelMid-chat swap
02

Six frontier models, one picker

GPT-5.4 mini, GPT-4.1, o4-mini, Claude Opus 4.7, Sonnet 4.6, and Haiku 4.5. Pick per message and switch mid-thread.

03

Regenerate without burying the original

A new answer becomes a branch off the same parent. The original stays available, and each path keeps moving until you decide which one was the work.

04

Bring the source material

Drop in PDFs and screenshots. Vision-capable models see images directly, and document context stays in the conversation.

05

Ground answers with web search

Pro adds cited web search, so fresh facts get checked instead of guessed.

06

A free tier worth evaluating on

10 messages a day on every model, including Opus 4.7. No card required. Upgrade when limits become the constraint, not onboarding.

In motion

Same thread. Different model, different angle.

Switch the model mid-thought. The prompt, files, and custom instructions stay attached while the answer becomes a branch.

oran.chat / branch comparelive

You /

GPT-5.4 mini
OpenAI

Waiting on your prompt
system prompt / applied

The point is not more chat windows. It is a better conversation graph.

At the desk

Three desks. One studio.

oran.chat is for people who already know what they want from AI and need a quieter place to do the work.

practice

For engineers

Keep a code-first system prompt on every chat. Switch to a larger model when the bug needs deeper reasoning. Attach screenshots, logs, and specs without restarting the thread.

  • Custom system prompt
  • Mid-chat model swap
  • Attach PDFs and screenshots
practice

For writers

Pin the voice once, then compare models against the same brief. Branch rewrites without losing the original angle or the notes that led there.

  • Voice in custom instructions
  • Branch to rewrite
  • Every model, every tier
practice

For researchers

Drop PDFs in, ask with context, then use cited web search on Pro when the answer needs current facts. Keep interpretations in separate branches.

  • Native PDF and vision
  • Cited web search
  • Searchable history

Pricing

Start free. Stay free if it suits you.

Two tiers. The studio is in both. Pro lifts the limits and adds web-search citations.

Free

Enough to settle in.

$0always
  • 10 messages every day
  • Every model, including Opus 4.7
  • Custom instructions and branching
  • File attachments and full history
  • No credit card
Start free

Quota resets at midnight local.

recommended

Pro

For the days you would rather not count.

$--/ month
  • Unlimited messages across all models
  • Web search with citations
  • Larger context windows
  • Higher file-upload limits
  • Priority routing on busy hours
  • Early access to new models
Go Pro

Cancel any time, keep your history.

FAQ

A few fair questions.

  • What models do you support?

    OpenAI's GPT-5.4 mini, GPT-4.1, and o4-mini, plus Anthropic's Claude Opus 4.7, Sonnet 4.6, and Haiku 4.5. New models show up quickly after release.

  • Can I set custom instructions?

    Yes. Set a system prompt in settings and it prepends every chat across every model. Switch models mid-thread and the instructions follow.

  • Why not just use ChatGPT or Claude.ai directly?

    Because the switching cost is real. oran.chat keeps GPT and Claude in one thread, one instruction set, branching, attachments, and Pro web search with citations.

  • How does the free tier work?

    10 messages every day, on every model including Opus. No credit card and no trial cliff. Quota resets at midnight local.

  • What's in Pro?

    Unlimited messages on every model, web search with citations, larger context windows, higher attachment limits, priority routing, and early access to new models.

  • Do you train on my conversations?

    No. Conversations stay private to your account. OpenAI and Anthropic do not train on API traffic by default, and we do not use your content for model training.

  • How does branching work?

    Regenerate a reply and the new answer becomes a branch off the same parent. The original stays available, and each branch can continue from there.

Still curious? hello@oran.chat

The door is open

Step into a quieter studio. Ten messages free every day.

No credit card. 10 free messages every day on every model, including Opus 4.7. Custom instructions, branching, and attachments are all on the free tier.