BYOK AI workspace

One workspace for every major AI model.

Connect the providers you already use, switch models without starting over, and keep control of your keys and provider costs.

Start free trialSee how it works
7-day free trialNo card requiredPro $4/month · Lifetime $39
multimodelchat.com / workspace

Current model

Claude Sonnet 5

Compare the best approach for this product launch.
Model switched · context kept

Claude

continuing the same conversation

Building on that: pair the launch story with one concrete before-and-after example.

Ask anything...
One conversation workflow across connected models
Pricing

Pay for the workspace. Keep your AI billing separate.

Choose monthly access or pay once for the workspace. Connected AI providers continue to bill their usage directly at their own rates.

Compare ChatGPT Plus with API and BYOK costs

Pro

7-day trial
$4/ month

Flexible workspace access with recurring platform billing. Includes 10 app-funded searches during the trial and 200 each month after upgrading.

Start free trial

No card required to start. Cancel anytime.

Lifetime Access

$39one time

Pay once for workspace access with no recurring platform fee. Use your own LinkUp or Exa key for search.

View Lifetime Access

Provider and search usage billed separately.

Included with both plans

  • Multiple providers in one interface
  • One conversation workflow
  • Direct provider billing
  • Removable provider connections
Cost calculator

Estimate what your AI setup would actually cost.

Choose a model and approximate your monthly usage. We'll separate the workspace fee from the provider usage you would pay directly.

Pro estimate$62.58 / month

Estimated Pro monthly total $62.58. Estimated Lifetime ongoing monthly usage $58.58.

Your usage

Approximate a typical month

44 priced models

Anthropic: $10/M input · $50/M output · $1/M cache read · $12.5/M cache write

Average messages, not prompts
Tokens per message
Adjust token assumptions
One search per response max

Estimated cost

Claude Fable 5

300 messages · 250 searches

Live estimate

Pro monthly total

$62.58

$4 workspace fee plus estimated usage

Lifetime ongoing usage

$58.58

Usage only after the $39 purchase

Provider usage

$57.08

10K input / 2K output / 500 reasoning tokens per message

Search usage

$1.50

250 LinkUp calls at $0.006

Lifetime first month: $97.58Break-even: month 10

Estimates cover contexts up to 200K tokens, use published input/output rates, assume 40% of input tokens hit the prompt cache (5% cache writes), and bill reasoning tokens at the output rate. Provider discounts, taxes, and currency conversion can change the actual bill. Search rates are for standard sourced-answer style calls with up to ten results.

Security

Your keys stay under your control.

Choose hosted encrypted storage or local browser encryption. Hosted keys are decrypted server-side only when needed; local keys cross TLS for a request and are used in memory.

  1. Stored your way

    Choose hosted encrypted storage or local browser encryption.

  2. Used only when needed

    Keys are used when making requests to the connected provider.

  3. Connections stay yours

    Manage or remove provider connections from your workspace.

Direct provider billing. Your connected provider bills your API usage directly.

Read privacy and key-handling details
Compatibility

Connect the providers you already use.

Add a supported provider key, then choose from its available models inside one workspace.

Also supports OpenRouter and custom OpenAI-compatible endpoints.

Supported now

OpenAI

GPT models

View models
  • GPT-5.6 Sol
  • GPT-5.6 Terra
  • GPT-5.6 Luna
  • GPT-5.4 Mini
  • GPT-5.4 Nano
Setup guide

Anthropic

Claude models

View models
  • Claude Fable 5
  • Claude Opus 5
  • Claude Sonnet 5
  • Claude Haiku 4.5
Setup guide

Google

Gemini models

View models
  • Gemini 3.1 Pro
  • Gemini 3 Flash
  • Gemini 3.7 Flash
  • Gemini 3.1 Flash-Lite
Setup guide

xAI

Grok models

View models
  • Grok 4.6
  • Grok 4.1 Fast (Reasoning)
  • Grok 4.1 Fast (Non-Reasoning)
Setup guide

Every supported model. One workspace fee.

Pro $4/month or Lifetime $39, plus provider usage.

Open workspace
Setup

From provider key to first message in three steps.

01

Create a provider key

Generate an API key in your provider account.

02

Connect your provider

Add the key securely to your workspace.

03

Choose a model and chat

Select a supported model and begin.

Open workspace
Setup guidesOpenAIAnthropicGooglexAI
FAQ

Questions before you connect a key?

Understand how keys are handled, who bills your AI usage, and what happens when you connect or remove a provider.

Hosted keysKept in encrypted storage and decrypted server-side only when needed for a request.
Local keysRemain encrypted in your browser, travel over TLS for a request, and are used in memory.

Bring your keys. Keep control of your AI spend.

Connect a supported provider and use its models from one workspace.

Pro $4/month or Lifetime $39Provider usage billed separately.

Open workspace

Guides and comparisons

Make the most of a multi-model workspace.

Learn how BYOK works, choose the right model workflow, and connect compatible APIs without paying for multiple overlapping subscriptions.

Start here

Chat with multiple AI models in one conversation

A practical GPT, Claude, Gemini, and Grok workflow with BYOK setup steps.

Read the guide

ChatGPT BYOK vs ChatGPT Plus

Compare subscription pricing with paying providers directly through API usage.

Read the guide

What is an OpenAI-compatible API?

Understand base URLs, model IDs, and how to connect compatible endpoints.

Read the guide