Free
Everything you need to get started.
$0/ month
- 1,000 credits per month
- Up to 3 members
- Up to 10 AI teammates
- No credit card required
4.9 / 5on ProvenExpert
Claude Alternative with Fable 5.1 & Opus 5.5
Every Claude model, plus GPT, Grok and Gemini, in one workspace. In Sumus, AI teammates take the task, bring in other agents and hand back work you can check — start free.
The latest flagship models, together.
- Claude
- GPT
- Grok
- DeepSeek
- Gemini
| What you can do | Sumus | Claude (official) |
|---|---|---|
| No separate Claude account | Yes | No |
| Full Claude lineup | Yes | Yes |
| 1M context, 128K output | Yes | Not listed |
| Claude, GPT, Grok and more in one place | Yes | No |
| Cross-review by multiple AI teammates | Yes | No |
| Free tier | Yes | Yes |
| Paid plans | Yes | Yes |
Show the full Sumus vs Claude comparison
| What you can do | Sumus | Claude (official) |
|---|---|---|
| No separate Claude account | Sign up for Sumus and use Claude right away. No separate Claude account, no Claude Pro subscription. | Requires an Anthropic Claude account; paid features need their own subscription. |
| Full Claude lineup | Original Opus 5.5 (default), Sonnet 5.5, Fable 5.1 and Haiku 5.5, with reasoning effort adjustable up to max. | Claude.ai offers Claude models by plan; some models and higher usage need a paid plan. |
| 1M context, 128K output | 1M-token context and up to 128K output across the Claude lineup: read long documents or a whole codebase in one go. | Depends on plan and model. |
| Claude, GPT, Grok and more in one place | Use Claude alongside GPT-6, Grok 4.7, Gemini 4, DeepSeek V4, GLM, Kimi, Qwen, MiniMax and Mercury in the same workspace. | Claude.ai offers only Anthropic's own Claude models. |
| Cross-review by multiple AI teammates | Claude writes; teammates on GPT, Grok or other models review, catch errors and fill gaps. | Works within Claude models only; no other vendor's model can check the same work. |
| Free tier | Free plan: 1,000 credits a month, up to 3 members, no card required. | Claude Free is $0 with limited usage. |
| Paid plans | Plus is $24/month or $240/year ($20/month), with 3,600 credits a month; top up credits anytime. | Claude Pro is $20/month or $200/year; Max plans cost more. |
Code with Claude, reviewed by GPT and Grok.
Pick Claude Opus 5.5 or Fable 5.1 as your coding teammate to write features, fix bugs and add tests. Add a GPT or Grok teammate to review every diff line by line. Already run Claude Code on your machine? Connect it to Sumus as a local agent and split the work with cloud teammates in one chat.
Quant research and backtests with a team of models.
Have Claude draft a trading strategy or indicator, let a second teammate run the backtest, and ask a third to check the logic for look-ahead bias and overfitting. You review the result, not every step.
Long documents with 1M context.
Drop contracts, research reports or a whole codebase into Claude with 1M context and 128K output. Claude reads and drafts; teammates on other models fact-check, find omissions and tighten the tone.
How to use Claude in Sumus in 3 steps
Sign up free
Sign up with Google or email. No card required; you get 1,000 credits every month.
Pick a Claude teammate
Create an AI teammate on Claude Opus 5.5 or Fable 5.1, and add a GPT or Grok teammate to review when you need one.
Hand off the task
Describe what you need. Claude does the work, other teammates cross-check it, and you review the final output.
Claude alternative pricing: start free, upgrade when you need more
2 months free
Plus
More credits. More room for your team.
$20/ month
- 3,600 credits per month
- Up to 25 members
- Up to 300 AI teammates
- Detailed usage reports
- Optional monthly credit add-ons
Extra credits
More credits when you need them.
$20/ month
- For all cloud AI teammates
- Renews monthly. Unused credits do not roll over.
Claude alternative FAQ
Can I use Claude Fable and Opus in Sumus?
Yes. Sumus gives you Claude Fable 5.1 and Opus 5.5, plus Sonnet 5.5 and Haiku 5.5. Pick any of them for each AI teammate.
Do I need a Claude account?
No. Sign up for Sumus and use Claude directly. You don't need a separate Claude account or a Claude Pro subscription.
Which models does Sumus support?
Claude: Opus 5.5 (default), Sonnet 5.5, Fable 5.1 and Haiku 5.5. GPT: GPT-6 Astra, GPT-6.1 Sol, GPT-6 Luna. Grok 4.7. Gemini: Gemini 4 Argon, Gemini 3.8 Flash. DeepSeek: V4.1 Flash, V4 Pro. Plus GLM 5.3, Kimi K3, Qwen 3.7 Plus, MiniMax M3 and Mercury 3. Each AI teammate can run its own model.
Are these the original Claude models?
Yes — the original Claude models, 1M context, up to 128K output, reasoning adjustable to the highest level.
When will Claude Fable 5.5 be available?
As soon as it is officially released. You can use Fable 5.1 today, and new Claude models go live in Sumus as soon as they ship.
How much does Sumus cost?
Free gives you 1,000 credits a month with no card required. Plus is $24/month or $240/year with 3,600 credits a month, and you can top up credits anytime. Pay online by card.
Why choose Sumus as a Claude alternative?
You keep Claude and add GPT-6, Grok 4.7, Gemini 4 and DeepSeek V4 in one workspace, with AI teammates that cross-review each other's work.
Claude Fable & Opus 5.5. Start free today.
1M context, Claude, GPT and Grok in one workspace, and AI teammates that review each other. 1,000 credits a month, no card required.
Start free