Quick Verdict
| Buyer type | Best pick | Why |
|---|---|---|
| $20 personal plan | ChatGPT Plus | Broader bundle: GPT-5.6 rollout, voice, images, files, memory, and deep research |
| Writing or coding focus | Claude Pro | Better fit for long prose, review, and Claude-style coding help |
| $100 heavy tier | Depends | ChatGPT Pro 5x adds OpenAI capacity and Codex; Claude Max 5x adds higher Claude limits and Fable 5 access |
| $200 heavy tier | Claude for Claude work, ChatGPT for OpenAI tools | Claude Max 20x is stronger for long Claude sessions; ChatGPT Pro wins for Sora, Operator, voice, and the OpenAI bundle |
| API default | GPT-5.6 Luna or Claude Sonnet 5 | Luna is cheaper; Sonnet can be worth it when coding or writing quality reduces rework |
| Premium API route | GPT-5.6 Sol or Claude Fable 5 | Sol is expensive; Fable 5 is more expensive and should be reserved for hard Claude workloads |
Coding-plan alternative: If your comparison is really about agentic coding quotas, also price the GLM Coding Plan. It starts at $18/month, tops out at $160/month, and can be cheaper than ChatGPT Pro or Claude Max for supported coding tools.
For live provider details, use the OpenAI pricing, Anthropic pricing, and AI subscription tracker pages. Use the calculator above for your monthly API volume.
Subscription Pricing
| Plan | Price | Best for |
|---|---|---|
| ChatGPT Plus | $20/mo | General productivity, multimodal tools, files, voice, images, and GPT-5.6 rollout access |
| Claude Pro | $20/mo | Writing, coding help, document reasoning, and Claude-native workflows |
| ChatGPT Pro 5x | $100/mo | OpenAI-heavy users who need more capacity and Codex without the $200 tier |
| Claude Max 5x | $100/mo | Heavy Claude users who want more usage before the $200 tier |
| ChatGPT Pro 20x | $200/mo | Highest self-serve ChatGPT capacity plus Sora, Operator, voice, and Codex |
| Claude Max 20x | $200/mo | Daily Claude power users, Claude Code workflows, and long document sessions |
| Claude Team Premium | $125/seat/mo monthly or $100/seat/mo annual | Teams that need higher Claude limits and Fable 5 access |
At $20/month, ChatGPT Plus is the safer default for most users because it bundles more product surface area. Claude Pro is still easy to justify if your day is mostly writing, coding, reviewing, or long-document work.
At $100 and $200, choose based on where you actually work. ChatGPT Pro is the stronger package if OpenAI tools are the product. Claude Max is stronger if Claude Code, long context, and Claude response style are the product.
API Pricing Table
| Model | Input / 1M | Cached input / 1M | Output / 1M | Best use |
|---|---|---|---|---|
| GPT-5.6 Luna | $1.00 | $0.10 | $6.00 | Lower-cost GPT-5.6 production traffic |
| GPT-5.6 Terra | $2.50 | $0.25 | $15.00 | Balanced GPT-5.6 workloads |
| GPT-5.6 Sol | $5.00 | $0.50 | $30.00 | Premium OpenAI reasoning and coding |
| Claude Haiku 4.5 | $1.00 | $0.10 | $5.00 | Fast Claude-native utility tasks |
| Claude Sonnet 5 | $2.00 | $0.20 | $10.00 | Default Claude production route |
| Claude Opus 4.8 | $5.00 | $0.50 | $25.00 | Premium Claude fallback |
| Claude Fable 5 | $10.00 | $1.00 | $50.00 | Hard Claude workloads only |
The API answer is not the same as the subscription answer. GPT-5.6 Luna is the cheapest current GPT-5.6 route. Claude Sonnet 5 is the practical Claude default. Fable 5 and GPT-5.6 Sol should be escalation routes, not the default for every request.
Practical Routing
| Workload | First route | Escalation route |
|---|---|---|
| General chat or support | GPT-5.6 Luna | Claude Sonnet 5 or GPT-5.6 Terra |
| Coding review | Claude Sonnet 5 | Claude Opus 4.8 or GPT-5.6 Sol |
| Long writing or editing | Claude Sonnet 5 | Claude Opus 4.8 or Fable 5 |
| OpenAI product workflows | GPT-5.6 Luna | GPT-5.6 Sol |
| Hard Claude workflows | Claude Sonnet 5 | Claude Fable 5 only when quality pays for it |
Caching matters for both providers. If your app repeats system prompts, tool definitions, retrieval context, or style rules, cached input can change the winner faster than sticker price.
FAQ
Is ChatGPT Plus cheaper than Claude Pro?
No. Both are $20/month in the current tracked subscription data. ChatGPT Plus usually includes more product features, while Claude Pro is often better for writing, coding help, and long document work.
Is the OpenAI API cheaper than the Claude API?
Usually, yes. GPT-5.6 Luna is cheaper than Claude Sonnet 5 on output and far cheaper than Claude Fable 5. Claude can still win when it reduces failed outputs or review time.
Is Claude better for coding?
For many teams, yes. Claude Sonnet, Opus, and Fable models are common choices for code generation, review, and agent workflows. Test against real tasks before paying Fable rates.
Should I use a subscription or the API?
Use a subscription for personal interactive work. Use the API for production software, automation, metered team workflows, and anything that needs predictable billing.
Is ChatGPT Pro worth it over Claude Max?
Only if you need OpenAI-specific tools such as Sora, Operator, Advanced Voice, Codex, or the broader ChatGPT bundle. For Claude-heavy work, Claude Max is usually the better fit.
Bottom Line
Start with ChatGPT Plus if you want one broad $20 assistant. Start with Claude Pro if your daily work is writing, coding, or long-document reasoning. For APIs, route most work through GPT-5.6 Luna or Claude Sonnet 5, then escalate only when quality justifies Sol, Opus, or Fable.