Skip to main content
ZeroTwo organizes its 95+ models into two tiers: Standard and Premium. Understanding the difference helps you get the most out of your monthly quota.

​
The two tiers

​
Standard models

Standard models have no monthly message cap. You can use them as much as you want on any plan, including Free. Standard models are fast, capable, and suitable for the majority of tasks. They include the smaller and more efficient variants from major providers:
  • GPT-5-mini
  • GPT-4o-mini
  • GPT-4.1-nano
  • Gemini 2.5 Flash Lite
  • Gemini 2.0 Flash
  • Mistral Small
  • Mistral Nemo
  • Grok 4 fast
  • Other smaller/faster model variants

​
Premium (rate-limited) models

Premium models are ZeroTwo’s highest-capability models. They’re counted against your monthly quota and require a Pro+ plan to access. Premium models include:
  • Claude Opus 4.6
  • Claude Sonnet 4.6
  • Claude Sonnet 4.5
  • Claude Sonnet 4.1 / 4.0
  • Claude Haiku 4.5
  • Claude 3.5 Sonnet / 3.5 Haiku
  • GPT-5
  • GPT-4o
  • GPT-4.1
  • Gemini 3.1 Pro
  • Gemini 2.5 Pro
  • Gemini 2.5 Flash
  • Grok-4
  • Cohere Command A
  • Mistral Large
  • Magistral
  • Qwen Max
  • Perplexity Sonar Pro
  • o3, o4-mini (reasoning models)
  • DeepSeek Reasoner

​
Monthly quotas by plan

PlanPremium message quota
Free0 — standard models only
Pro555 messages/month
Pro 2x1,150 messages/month
Plus UltraUnlimited
BusinessUnlimited
Each message sent using a premium model counts as 1 premium message against your monthly quota.
The quota resets at the start of each billing cycle. Go to Settings → Account to see your current premium message usage and remaining quota for the month.

​
What counts as a premium message

A premium message is any message you send in a chat where the selected model is a rate-limited premium model. The following do not count against your premium quota:
  • Messages sent using standard models
  • AI responses (only your sent messages count)
  • Messages in Studio (image, video, and audio generation use separate Studio credits, not the premium message quota)

​
When your quota is exceeded

When you reach your monthly premium message limit, ZeroTwo automatically falls back to a standard model for that message. You’ll see a notification in the chat indicating that the fallback occurred. What you can do when quota is exceeded:
  1. Continue with the fallback standard model — it will be a capable standard model and sufficient for many tasks
  2. Wait until next month — your quota resets at your billing cycle renewal date
  3. Upgrade your plan — move from Pro to Pro 2x, or from Pro 2x to Plus Ultra for more or unlimited premium messages
Fallback models (used when quota is exceeded):
  • GPT-5-mini
  • GPT-4o-mini
  • Gemini Flash Lite
  • Mistral Small
  • Grok 4 fast
The specific fallback model assigned may vary. You can also manually switch to any standard model yourself.

​
Checking your quota

To see your current premium message usage:
  1. Go to Settings → Account
  2. Look for the Premium messages section
  3. Your usage for the current billing cycle and remaining quota are displayed

​
Strategies for managing your quota

Use standard models for drafts and iterations. When brainstorming, writing early drafts, or doing quick Q&A, standard models like GPT-4o-mini or Gemini Flash Lite are fast and capable. Save premium model messages for final-quality output, complex reasoning, and tasks where the extra capability meaningfully improves the result.
Practical approaches:
  • Iterate with standard, finalize with premium: Write first drafts with GPT-4o-mini, then switch to Claude Sonnet 4.6 or GPT-5 for the final polished version
  • Use premium for hard problems only: Complex coding, detailed analysis, multi-step reasoning — these benefit most from premium models
  • Match model to task: Not every task needs the most capable model. Simple questions, reformatting, and quick lookups are just as well handled by standard models
  • Check usage mid-month: If you’re burning through quota quickly, check Settings → Account and adjust your habits before hitting the limit