Claude has become a mainstream choice for long-form writing in 2026. The reason is simple: it listens better. If you tell it not to write a conclusion, it really will not. If you ask for a specific output format, it follows more often than other models. This article covers the model tiers, plan differences, Chinese-language ability, and how to split work with ChatGPT.
TL;DR: Claude is Anthropic’s AI assistant, with four tiers: flagship, Opus, Sonnet, and Haiku. Pro suits most people; the flagship tier handles the hardest work, while Sonnet is for everyday use. Claude is available in Taiwan without a VPN.
Update: Anthropic released its flagship Fable model above Opus on June 9, 2026 (see What Is Claude Fable 5). The model-choice section below reflects the current lineup; check Claude or Claude Code’s /model display for the versions available to your account.
What Is Claude?
Claude is an AI assistant made by Anthropic. Many of Anthropic’s founders came from OpenAI, so Claude has been compared with ChatGPT from the beginning.
The differences between the two will be covered later. First, Claude itself.
You can create an account at claude.ai and use the Sonnet model for free. The interface is conversational, similar to ChatGPT. Type a question, and it answers.
Claude’s real strength becomes obvious when you start caring about output quality: for the same 3,000-character article, ChatGPT may need more than 40% revision, while Claude may need only 15-20%. Over a week, the time saved is substantial.
How to Choose Between the Four Models
Current lineup (updated September 29, 2026): flagship Claude Fable 5.1 (September 1) → Opus 5.5 (September 22; strongest included with Pro, which Anthropic says reaches Fable 5.1 level on most tasks) → Sonnet 5.5 (September 28; everyday workhorse) → Haiku 4.5 (lightweight and fast; Anthropic says Haiku 5.5 is coming in the next few weeks). Check Claude or Claude Code
/modelfor the versions on your account.
Claude has four model tiers for general users, each with a different role.
Fable 5: The Capability Ceiling
Fable 5 launched on June 9, 2026, and sits above the Opus class; Anthropic says its capabilities “exceed those of any model we’ve ever made generally available.” It shares the same underlying model as Mythos 5, which is restricted to vetted cybersecurity and biomedical professionals. Fable adds a safety layer: prompts in sensitive areas are answered by Opus instead (Anthropic says more than 95% of sessions do not trigger it).
The first 48 hours of outside signals line up: benchmark provider Artificial Analysis ranked it #1 overall in intelligence, and Andrej Karpathy called it “a major-version-bump-deserving step change,” especially for long, difficult problem-solving. The tradeoff is cost: API pricing is substantially higher than Opus, and the quota drains noticeably faster.
Best for: the hardest, longest tasks and long-horizon agent workflows. The initial promotion (50% of the weekly limit for Pro) ended on July 19, 2026. Pro now requires usage credits; Max and Ultra can allocate up to 50% of its weekly limit to Fable. Start with a small test. See Claude Fable 5.1 and the original Fable 5 guide.
Opus: Flagship
Opus is the strongest option included in subscriptions without extra credits (see the lineup above for the current version). It is designed for complex reasoning, long-running agentic coding, and high-autonomy workflows. Even after Fable arrived, Anthropic still recommends starting with Opus when unsure. For general users, the point is simple: complex reasoning, long-form writing, and code review remain steadiest and most cost-effective on Opus.
Practical scenarios: strategy planning, complex code audits, long article writing. Response quality is indeed one tier above Sonnet, but it is slower and costs more.
Best for: long-form writing, analysis, tasks requiring deep reasoning.
Sonnet: Daily Default
Sonnet is the everyday workhorse most people will use most often. The balance between speed and quality is strong. Daily Q&A, code writing, summaries, and translation are all enough. Think of it as Claude’s default workhorse: give most tasks to Sonnet, then switch to Opus only when truly stuck.
Reasonable split: send 80% of tasks to Sonnet, and switch to Opus only when deep thinking is required.
Best for: daily Q&A, coding, summaries, translation.
Haiku: Lightweight and Fast
Haiku is currently the fastest model, with responses that feel almost instant. Its ability is close to Sonnet, but the cost is much lower, making it suitable for high-frequency simple tasks.
Best for: bulk classification, simple summaries, formatting, batch processing.
For a more detailed comparison, see Claude Opus vs Sonnet Comparison.
Flagship / Opus / Sonnet / Haiku Decision Table
| Task | Recommended model | Why |
|---|---|---|
| Hardest and longest tasks, long-horizon agents, maximum capability | Flagship | The public capability ceiling; usage burns fast, so start with a small test |
| Long-form drafts, strategy, complex code review | Opus | Best instruction following, long-form stability, and deep reasoning |
| Daily Q&A, summaries, general coding, translation | Sonnet | Best speed-quality balance and the daily workhorse |
| Classification, formatting, lightweight batch tasks | Haiku | Fastest option for high-volume low-risk work |
| Multi-agent workflows | Opus + Sonnet mix | Opus handles strategy and review; Sonnet handles execution and batch work |
This is the core conclusion of Claude Opus vs Sonnet: do not send every task to Opus, and do not hand high-risk judgment to Sonnet just to save quota. The steadier pattern is to split strategy and execution.
Plan Comparison
Claude has four personal plans, plus Team and Enterprise. Prices follow Anthropic’s official information; this table summarizes features and practical usage.
| Plan | Monthly price | Available models | Usage | Special features |
|---|---|---|---|---|
| Free | $0 | Sonnet / Haiku | Resets every 5 hours; exact message count not published | Artifacts, Memory, Projects |
| Pro | $20 ($17/month when billed annually) | Opus / Sonnet / Haiku; Fable requires usage credits | Pro usage | Claude Code, Research, Claude Design |
| Max | $100 | All (Fable up to 50% of weekly limit) | 5x Pro (every 5 hours and every week) | Heavy users |
| Ultra | $200 | All (Fable up to 50% of weekly limit) | 10x Pro every week; no 5-hour limit on verified accounts | People running Claude Code all day |
(Prices are in USD; see Anthropic’s official pricing page.)
API prices as of September 2026 per million input/output tokens: Fable 5.1 US$10 / US$50, Opus 5.5 US$4 / US$20, Sonnet 5.5 US$2 / US$10, and Haiku 4.5 US$1 / US$5. Check the official pricing page for current rates.
Fable on subscription plans (October 2026): Free cannot use Fable. Pro usage is not included in the plan and requires usage credits. Max and Ultra include Fable, with up to 50% of the weekly limit available for Fable 5 and 5.1; additional use requires credits.
The table lists Free, Pro, Max, and Ultra without tying them to minor model versions.
Practical advice: start with Free. If you hit the limit two or three times a day, or need Opus, upgrade to Pro. Max suits heavy daily use; Ultra (formerly Max 20x; existing subscribers moved over automatically at the same price) is for people running Claude Code automation throughout the day.
See the full Claude Free Plan Guide.
The free plan is not a chat-only tier. It includes Sonnet / Haiku, Artifacts, Memory, Projects, file uploads, and chat history. Its limits are usage and Opus access: the five-hour limit is not published as a fixed message count, and long uploads or heavy tool use consume more. If you have fewer than 10 conversations a day, Free may be enough; upgrade if you hit limits daily or need Opus for reliable long-form work.
Chinese Ability
Many Taiwan users care about this: Claude’s Traditional Chinese is very good.
Several dimensions:
- Sentence fluency: natural, without machine-translation feel
- Word choice: leans toward Taiwan usage, rarely produces mainland wording
- Long-form quality retention: quality does not drop much even above 3,000 characters
- Taiwan context understanding: answers about Taiwan are usually correct
Opus’s Chinese quality is another step above Sonnet. If the main use is Chinese writing, Opus is recommended.
Compared with ChatGPT, Claude’s Chinese is more “stable.” ChatGPT sometimes suddenly switches into Simplified Chinese usage. Claude has much less of this problem.
Feature Highlights
Artifacts
Artifacts let Claude embed independent content blocks inside responses, such as code, charts, and documents. You can edit, copy, and preview directly inside them.
Common Artifacts outputs: tables, comparison diagrams, code snippets. It saves the process of copying a response into another tool and adjusting the format.
Projects
Free users can create up to 5 Projects; paid plans have no published numerical cap. It lets you put related chats and files under one project and set project-specific instructions.
A practical use: create one Project for each writing project, and put style guides, references, and prior conversation records inside. Every new conversation automatically brings in that context.
This is a bit like CLAUDE.md in Claude Code, but Projects operates in the web interface and does not require writing files.
Comparison With ChatGPT
The most frequently asked question.
| Item | Claude | ChatGPT |
|---|---|---|
| Instruction following | strong, does what you ask | medium, sometimes acts on its own |
| Creative ideation | medium | strong, many ideas |
| Long-form quality | high, stable structure | medium, easily loses focus |
| Chinese ability | strong, natural Traditional Chinese | medium, occasional Simplified Chinese |
| Ecosystem | smaller | large, many plugins |
| Image generation | not supported | supported (GPT Image) |
Practical split: Claude writes long-form; ChatGPT ideates. Claude listens better, while ChatGPT has more ideas but can be hard to control. See the full matchup in Claude vs ChatGPT.
Taiwan User Guide
Taiwan users can directly access claude.ai without a VPN.
Registration flow:
- Go to claude.ai and click “Sign up”
- Register with a Google account or email
- Complete email verification
- Start using it
Taiwan credit cards can be used directly for paid plans.
Extra note: Claude’s servers are overseas, so occasional latency happens. If responses suddenly slow down, it is usually the API side being busy. Wait a bit; it is not a network problem.
A Practical Way to Use It
Writing: give all long-form first drafts to Claude Opus. Provide an outline, style guide, and reference examples. It produces a draft, then you revise.
Analysis: when receiving a long report or technical document, send it to Claude for summary and key extraction. Opus is especially strong here.
Translation: Chinese-English translation. Claude’s Chinese output is much more natural than Google Translate and needs very little major revision.
Code: daily code review, bug fixes, and test writing are enough on Sonnet. Switch to Opus only for truly complex architecture discussion.
With Claude Code, most of these things can be done directly in Terminal without switching to the web version.
Penchan’s Take
Penchan treats Claude as the main daily AI tool, about half of total AI usage time. Long-form writing, CLAUDE.md rule setting, and planning/review inside Claude Code all go to it. Its writing style feels the most comfortable among all tools Penchan has used, and that impression has not changed for a year.
For model switching, Penchan is on Ultra and used to run 100% Opus, with Sonnet helping on coding, data pulls, and image reading when needed. On Fable 5 launch day Penchan switched the Claude Code default over to try it; first impressions match the community consensus: noticeably better stamina on long tasks, but quota burns fast, so test it yourself with a small test before committing.
For Chinese writing, Claude is currently the steadiest by feel. Give it a style guide with twenty rules, and it can follow almost all of them. A 3,000-character article keeps the same tone from start to finish. Other models start drifting in the middle of long-form output.
Further Reading
- What Is Claude Fable 5
- What Is Claude Mythos
- Claude Opus vs Sonnet Comparison
- Claude Free Plan Guide
- Claude Code Complete Guide
- Claude vs ChatGPT
- Claude Design Hands-on
Claude Ecosystem Extension
Claude Design is better understood as an accelerator from idea to demo, not Claude’s main capability and not a full Figma replacement. Its correct place in this hub is ecosystem extension: Claude web handles long-form and knowledge work, Claude Code handles Terminal / agentic development, and Claude Design handles early prototypes and visual demos.
— Penchan