31 voices · one subscription
EN · 2026
Claude, GPT and the others, gathered in one quiet place to write. Change your mind mid-sentence, change voice: the thread holds.
15 messages on the house · no card asked · leave whenever you like
The voices
Card · SEPA Direct Debit
Statement of intent
Tighten this paragraph into two sentences without losing the meaning.
Claude Opus 5 · Anthropic
Here is a tighter version. I kept the two load-bearing ideas and cut the opening, which repeated the title…
IThe voices
A quick voice for short work, a slower one for the hard problems. The choice is yours, message by message.
Claude Opus 5
Claude Sonnet 5
Claude Haiku 4.5
GPT-4.1
GPT-4o
GPT-4o mini
Gemini 2.5 Pro
Gemini 2.5 Flash
Mistral Large
Mistral Small
Grok 4
DeepSeek Chat
DeepSeek Reasoner
Llama 3.3 70B
GPT-5.2
OpenAI's latest. Broad reasoning, at ease everywhere.
GPT-5.1
OpenAI's previous generation, still very strong.
GPT-5 mini
Small and quick, for questions that will not wait.
Claude Opus 4.8
Anthropic's most composed. Long analysis, demanding code.
Claude Sonnet 4.5
Anthropic's balance of speed and finesse.
Claude Haiku 4.5
Brief and immediate, the everyday one.
Gemini 2.5 Pro
A very long memory: large documents do not faze it.
Gemini 2.5 Flash
Gemini in a hurry, for quick back-and-forth.
Mistral Large 3
The European one. Impeccable French, clean answers.
Mistral Small
Light and direct, when the question deserves no detour.
Grok 4.5
Blunter than the rest, sometimes disarmingly so.
DeepSeek V4 Pro
Surprisingly sound on code, at a low price.
DeepSeek V4 Flash
DeepSeek's fast version, for rough drafts.
GLM 5.1
The rising one from China, general and quick.
Kimi K2.6
Built for the long haul: massive contexts are its ground.
Qwen3 235B
A very large open model, versatile and reasoning.
GPT OSS 120B
Open and served fast: answers arrive in one piece.
One subscription instead of four
€9.99 a weekIIThe studio
What you want from a working tool, and nothing else piled on top.
Move from Opus 5 to GPT-4.1 mid-exchange without losing the thread. Put the same question to two voices, read them one after the other, keep the one that speaks to you.
01
€9.99 a week covers every voice. One line on the statement, not four.
02
The answer starts writing as soon as the first words are found. No wait, no queue.
03
Every conversation is kept, renameable, and there on any device.
04
Card or SEPA. You leave in one click, no explanation owed.
IIIIn practice
Nothing to configure, no keys to juggle. You write; the rest is our problem.
1
An address and a password. The card can wait until you are convinced.
2
One menu, top of the page. Switch whenever you like, even mid-paragraph.
3
The answer composes itself in front of you. Copy it, ask again, come back tomorrow.
IVThe choice
Every lab sells its own. Polyphonie gathers them behind one page and one payment.
| Polyphonie | Separate subscriptions | |
|---|---|---|
| Anthropic models (Claude) | Yes | No |
| OpenAI models (GPT) | Yes | No |
| Change voice without changing tab | Yes | No |
| Put the same question to two voices | Yes | No |
| One subscription to track and cancel | Yes | No |
| One line on the bank statement | Yes | No |
| SEPA Direct Debit | Yes | No |
A comparison of features, not prices: competitors change theirs often, so check with them.
The price
/ week
Charged weekly. Card or SEPA Direct Debit.
Payment by Stripe. 15 messages on the house before any card.
No commitment
VQuestions
The account takes thirty seconds. The card comes later, or never.