claude-haiku-5-5
I would like to move our November 6 meeting from 15:00 to 16:00, if that is possible. Could you please let me know whether the new time works for you?
COMPARE WITH CHAPPIE
One question. Room for another answer.
Your first answer does not have to be your last. Compare responses from multiple AI models, choose what fits your work, and keep the conversation together on iPhone and Android.
Compare the answer. Keep the conversation.
Compare the answer. Keep the conversation.
- 01
Ask the same question
Use comparison with the models available to your plan. Keep the background, constraints and requested output the same so the differences are easier to judge.
- 02
Look for the useful differences
Compare facts, instruction-following and the editing left to do, not just length. Agreement between models is not proof of correctness; check important claims and sources yourself.
- 03
Switch models, keep your history
Change models during a conversation and continue in one history. Spend less time copying the same background between separate apps and more time working with the answer.
A small difference, from real API outputs
The same email request. Three ways to say it.
These English examples were generated through three providers’ APIs on October 30, 2026, using one fixed English prompt and one run per model. This is not the Chappie interface or an in-app performance measurement. The models are not matched price or capability tiers; these outputs do not rank them. No web search or tools were used; provider settings and complete outputs are downloadable below.
The exact input sent to every model
Rewrite these notes as a polite email body to a business partner. Use exactly two sentences, with no subject line, greeting or signature. Keep the date and times unchanged and do not add a reason. Notes: I would like to move our November 6 meeting from 15:00 to 16:00. Please ask whether the new time works for them.
gemini-3.8-flash
I would like to request moving our meeting on November 6 from 15:00 to 16:00. Please let me know if this new time works well with your schedule.
gpt-5.4-mini
I would like to move our November 6 meeting from 15:00 to 16:00. Please let me know whether the new time works for you.
For a separate Japanese example, read the six-task Japanese API study and its limitations.
A useful fit when you want to…
- Compare answers from several AI models
- Choose writing or explanations against your own criteria
- Keep the conversation together when you change models
Check the boundaries before choosing
- If you need a feature specific to an official provider’s app, check that product’s offering directly.
- A Chappie subscription does not include ChatGPT Plus, Claude Pro, Google AI Pro or Poe subscriptions.
- Available models and usage allowances are shown in the app. Model access does not mean unlimited use.
PLANS & ALLOWANCES
What the price and allowance mean
The annual plan for new US customers is US$129.99, billed once a year (public offer dated October 29, 2026). Prices and offers vary by region, purchase provider, eligibility and retained plan.
Free to download is different from ongoing free use. Check your price and usage allowances before purchase. Trials are only for eligible customers; duration, renewal price and terms are displayed before purchase. A trial renews as a paid subscription unless cancelled.
New iOS subscriptions are billed by Apple and Android subscriptions by Google Play. Web checkout offered after an eligible failed Apple purchase, and existing web subscriptions, use Stripe. Manage your subscription with the original billing provider. Uninstalling the app or deleting an account does not cancel it.
Some existing plans have an annual commitment paid monthly. Stopping renewal does not automatically cancel remaining committed payments. Check your own contract’s billing interval and commitment length.
Chappie is an independent app operated by Mitissa, LLC. It is not owned or operated by OpenAI, Anthropic, Google, xAI or DeepSeek.
Guides for the decision
Bring a question of your own.
