CHOOSE BY OUTCOME

Best AI for Build Software

Compare AI coding assistants and models for writing, debugging, refactoring, and agent driven development.

BEFORE THE SHORTLIST

How to choose in this category

How to choose

The first decision is whether you are willing to change editor. If not, an assistant that works inside your existing IDE removes the adoption problem entirely. If you are, a purpose built AI editor gives you whole repository context that plugins struggle to match.

Watch the billing model

Almost every product here now separates unlimited completions from metered agent credits. Two developers on the same plan can have very different bills.

Check what happens when the credits run out. Some stop, and some move you to usage based billing without a hard ceiling.

If your code cannot leave your infrastructure

Open weight models have closed most of the capability gap. A permissively licensed model you host yourself is now a serious option rather than a compromise, and it removes the review that a security team would otherwise have to run on a third party.

THE QUICK READ

Strong choices, for different reasons

Best all rounder

ChatGPT

Still the most capable single subscription when your work refuses to stay in one lane.

Go USD 8 per month, Plus USD 20 per month, Pro USD 100 or USD 200 per month, all billed monthly Read the profile → Best for long form writing and code

Claude

The best environment for work where the document or the codebase is the deliverable, with the clearest privacy default of the major assistants.

Pro USD 20 per month, or USD 17 per month billed annually. Max from USD 100 per month Read the profile → Best for real time context

Grok

Genuinely useful for live context, with privacy terms that tell you plainly not to type anything sensitive.

SuperGrok USD 30 per month. X Premium+ at USD 40 per month or USD 395 per year includes higher Grok limits Read the profile → Best free reasoning

DeepSeek

Remarkable capability for nothing, on terms that make it unsuitable for anything you would not publish.

No consumer subscription. Paid access is API only, from USD 0.14 per million input tokens Read the profile → Best in your existing editor

GitHub Copilot

The lowest friction coding assistant, with an individual training default that individual developers should go and change.

Pro USD 10 per month, Pro+ USD 39 per month, Max USD 100 per month Read the profile → Best for whole repository work

Cursor

The strongest option when the unit of work is the repository rather than the file, with a clean no training commitment.

Pro USD 20 per month, Pro+ USD 60 per month, Ultra USD 200 per month Read the profile →
SIDE BY SIDE

The decision table

Prices are shown as published by the vendor in U.S. dollars and may differ by region. Always check the vendor page before subscribing.

Product 18BYTE call Free option Paid price Best for Review status
ChatGPT Best all rounder Yes, with usage limits that vary by model and demand Go USD 8 per month, Plus USD 20 per month, Pro USD 100 or USD 200 per month, all billed monthly One workspace that moves between writing, research, analysis, and code Source review
Claude Best for long form writing and code Yes, including chat, code generation, web search, memory, and file creation, with usage limits Pro USD 20 per month, or USD 17 per month billed annually. Max from USD 100 per month Long documents, careful revision, and agentic coding Source review
Grok Best for real time context Yes, described by xAI as usable within generous limits SuperGrok USD 30 per month. X Premium+ at USD 40 per month or USD 395 per year includes higher Grok limits Questions about what is happening right now on the open web and on X Source review
DeepSeek Best free reasoning Yes. The web and mobile apps are free to use No consumer subscription. Paid access is API only, from USD 0.14 per million input tokens Technical problem solving at no cost Source review
GitHub Copilot Best in your existing editor Yes. 2,000 completions per month, limited chat and agent use, no card required Pro USD 10 per month, Pro+ USD 39 per month, Max USD 100 per month Inline completion and agent tasks without leaving the IDE you already use Source review
Cursor Best for whole repository work Yes, the Hobby tier, with limited Agent requests and no card required Pro USD 20 per month, Pro+ USD 60 per month, Ultra USD 200 per month Multi file refactoring and agent work across an entire codebase Source review
BEFORE YOU CHOOSE

What each one gets right, and where it asks you to compromise

Best all rounder

ChatGPT

Full profile →

Where it wins

  • The widest feature range of any consumer AI product, covering research, files, data, images, and code
  • Deep Research and web browsing built in
  • Projects, memory, and custom GPTs make repeat workflows genuinely faster
  • Four price points, from USD 8 to USD 200, so you can match spend to use

Know before choosing

  • The number of modes and models is genuinely confusing, and the right one is rarely obvious
  • Usage allowances are per model rather than one pool, so heavy users hit caps they did not expect
  • Chat data trains OpenAI models by default and you have to go and turn it off

Privacy note

OpenAI states consumer chat data is used to improve its models by default. You can disable this under Data controls, using the Improve the model for everyone toggle.

Verify current plan details ↗
Best for long form writing and code

Claude

Full profile →

Where it wins

  • The strongest default privacy position of the major assistants: consumer data is not used for training unless you opt in
  • Claude Code is included rather than sold separately, which is unusual value for developers
  • Excellent at long form drafting, structural editing, and reasoning over large documents
  • The free plan runs on Claude Sonnet 5, a frontier class model

Know before choosing

  • Usage limits apply on every tier, including Max, which Anthropic footnotes on its own pricing page
  • The Max tier price is quoted only as from USD 100 per month, so the 20x tier cost is not published
  • Less integrated web research than Perplexity or Gemini

Privacy note

Anthropic states consumer data is not used for model training unless you opt in through Model Improvement Privacy Settings, and Incognito chats are excluded even when that setting is enabled. This is the strongest default position among the major assistants.

Verify current plan details ↗
Best for real time context

Grok

Full profile →

Where it wins

  • Direct access to live posts on X, which no rival can match
  • Grok 4.5 posts strong published results on agentic coding benchmarks
  • A usable free tier

Know before choosing

  • xAI's SuperGrok Lite and Heavy tier prices are rendered by JavaScript on its pricing page and we could not read them
  • xAI's privacy policy explicitly tells users not to include personal information in prompts and states it cannot control what users submit
  • Prompts, searches, and responses may be used for training unless you turn the setting off

Privacy note

xAI states it may use prompts, searches, and Grok responses to train its models. You can turn off the Improve the model toggle under Settings and Data Controls, or use Private Chat. Its policy tells users not to include personal information in prompts.

Verify current plan details ↗
Best free reasoning

DeepSeek

Full profile →

Where it wins

  • Strong reasoning performance at no cost in the consumer app
  • API pricing is roughly a thirtieth of the Western flagships
  • The underlying V4-Flash weights are MIT licensed, so you can self host and avoid the data question entirely

Know before choosing

  • There is no consumer paid tier, so there is no plan with better data terms to upgrade to
  • DeepSeek states it stores personal data in the People's Republic of China
  • The training opt out is by email to privacy@deepseek.com rather than a setting, which is a meaningful practical barrier
  • DeepSeek warns a significant API price increase is expected

Privacy note

DeepSeek states it collects text and voice input, prompts, uploaded files, and photos and uses them to train and improve its machine learning models, stores personal data in the People's Republic of China, and provides a training opt out only by emailing privacy@deepseek.com.

Verify current plan details ↗
Best in your existing editor

GitHub Copilot

Full profile →

Where it wins

  • Works in every major editor rather than requiring you to switch to a new one
  • A real free tier at 2,000 completions per month with no card
  • Unlimited completions on all paid plans, with credits covering chat and agents on top

Know before choosing

  • Chat, agents, and CLI draw on a finite monthly credit balance, so only completions are truly unlimited
  • As of 24 April 2026 the Allow GitHub to use my data for AI model training setting is enabled by default for Copilot Free, Pro, Pro+, and Max, covering inputs, outputs, code snippets, and context
  • Business and Enterprise are excluded from training, but individuals are not

Privacy note

GitHub documents a setting named Allow GitHub to use my data for AI model training which, as of 24 April 2026, is enabled by default on all individual Copilot plans. Individuals opt out by setting it to Disabled. Business and Enterprise plans are excluded from training entirely.

Verify current plan details ↗
Best for whole repository work

Cursor

Full profile →

Where it wins

  • Built around whole repository context rather than single file completion
  • Cursor states it does not use your inputs or its suggestions to train its models, and does not permit third parties to
  • Free Hobby tier with no card required

Know before choosing

  • It is a full editor, so adopting it means leaving your current one
  • Paid tiers are defined by included model usage, and exceeding it moves you to usage based billing rather than stopping
  • The jump from Pro to Ultra is USD 180 a month, which is a serious commitment for an individual

Privacy note

Cursor states it does not use inputs or suggestions to train its models, nor permit third parties to, except where flagged for security review, explicitly reported by the user, or explicitly agreed to.

Verify current plan details ↗
UNDER THE HOOD

The models worth knowing for this work

These are engines rather than products. Relevant if you are building something, or if you want to know what the products above are actually running.

GPT-5.6 Sol Hard reasoning, agentic coding, and security research OpenAI GPT-5.6 Terra Everyday production work that still needs the full context window OpenAI Claude Opus 5 Agents that have to keep going for hours without losing the thread Anthropic Grok 4.5 Terminal and agentic coding work where token efficiency matters xAI DeepSeek-V4-Flash Teams that need to run a capable model on their own infrastructure DeepSeek Qwen3.8-Max Multi day autonomous coding projects Alibaba Qwen
HOW TO DECIDE

Choosing without regret

You have the comparison. This is how to turn it into a decision you will not want to reverse in a month.

Measure it on your own repository

Every product in this category performs well on a greenfield file. The useful test is an unfamiliar part of your own codebase: ask for a change that touches three files and see whether the result compiles, whether the tests still pass, and whether you can follow what it did.

Price the agent work, not the seat

The seat price in the table is the smaller number for most teams that use agents seriously. Run one realistic agent task, look at what it consumed, and multiply by how often you expect to do it. That figure is the one worth comparing.

Keep the review step

The failure mode in this category is not bad code, it is plausible code that is merged without being read. Whatever you choose, the diff still needs a human on it.

PRIMARY SOURCES

TRUST THE PROCESS

No mystery score. No paid winner.

We separate documented capabilities, editorial judgment, and measured testing, so you always know what supports a recommendation and what does not.

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