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Claude Opus 5.5 Free AI Chatbot

Access Claude Opus 5.5 on our free chatbot, built for coding, long documents and careful reasoning. Try it free by typing your queries and using the @ shortcut to unlock advanced features like AI website, document creation and even image generation, all for free.

Create anything with Claude Opus 5.5 using our @skills feature

About Claude Opus 5.5 AI model

Claude Opus 5.5 is the Anthropic model released on September 22, 2026 for long coding jobs, reports, spreadsheets and other knowledge work. AIFreeForever lets you try it for free, with no login and no Claude plan.

Claude Opus 5.5Made by Anthropic
Try Claude Opus 5.5 on AIFreeForever
Made byAnthropic
Model IDclaude-opus-5-5
ReleasedSeptember 22, 2026
API price per 1M tokens$4 in / $20 out
Price of Claude Opus 5.5 on AIFreeForeverFree

AIFreeForever is not affiliated with or endorsed by the model providers. All trademarks and logos belong to their owners.

How to try Claude Opus 5.5 for free

1Start at the chat boxClaude Opus 5.5 is ready in the chat box at the top.
2Describe the taskAsk it to review code, write a report or explain a topic. Give it the full details.
3Upload an Excel sheetAdd an .xlsx file for Claude Opus 5.5 to read, check or clean.
4Review the answerPress Enter, then read the answer and ask for changes.
Try it for free

Why choose AIFreeForever's free Claude Opus 5.5?

No upgrade required

Use Claude Opus 5.5 without a Claude plan, because AIFreeForever's Free AI runs it with no login.

Terminal coding

Get help with commands, scripts and long coding jobs from Claude Opus 5.5 without a paid plan.

Expert questions

Ask Claude Opus 5.5 the hard questions from your studies or your job and get careful answers for free.

Exact chart values

Upload a chart to AIFreeForever and Claude Opus 5.5 reads the exact values for you.

Your own language

Chat with Claude Opus 5.5 on AIFreeForever in Spanish, French, Arabic, Chinese and many other languages.

Real work tasks

Turn your notes into reports, plans and analysis with Claude Opus 5.5, free on AIFreeForever.

Chat with Claude Opus 5.5 on AIFreeForever

Chatting with Claude Opus 5.5 on AIFreeForever is free, with no login and no sign up. Write your prompt in the chatbot box at the top and press Enter. Claude Opus 5.5 always thinks first, so a long task can take a little longer to start.

This model is subject to availability, based on our budget. For long-term use, we advise you to pay for an upgrade with the model provider.

Tip: On AIFreeForever, Claude Opus 5.5 also comes with web search, so its answers can cite pages you can open. Make a slide deck using the @PPT skill and a whole eBook using the @Ebook skill on AIFreeForever, then download the files.

What you can create with Claude Opus 5.5

People on AIFreeForever use Claude Opus 5.5 to write and review code, build browser games and turn notes into reports. It also reads long PDFs, charts and screenshots, and follows detailed writing instructions. Each card comes with a prompt you can try.

A small wooden toy trebuchet with a long throwing arm, on a dark violet backgroundFree

A simulator from a sketch

Claude Opus 5.5 reads images, so it can turn a pencil drawing into working code. Attach your sketch first.

"This is my sketch of a trebuchet. Build it as a working simulator in one HTML file, with sliders for the arm length and the weight."

Try the prompt
A pelican made of smooth frosted glass sitting on a small chrome bicycle, on a dark violet backgroundFree

A 3D scene in Three.js

Claude Opus 5.5 writes a whole Three.js scene, with the shapes, the materials and the camera, in one file you can open.

"Write a Three.js scene of a pelican riding a bicycle, in one HTML file I can open in my browser."

Try the prompt
A futuristic game controller built from small glossy cube blocks in lavender and mint green, on a dark violet backgroundFree

A browser game

In early tests, a tester built a game from one prompt, and Claude Opus 5.5 scored highest on graphics and polish.

"Make a simple block building game that runs in my browser, with a day and night cycle. Put it all in one HTML file."

Try the prompt
A spiral of glowing glass tiles falling through the air, on a dark violet backgroundFree

An animation in one file

Claude Opus 5.5 can write animations in plain JavaScript, with no libraries to install.

"Make a 20 second animation of glass tiles falling into a pattern, in one HTML file with plain JavaScript."

Try the prompt
A small wooden easel with a blank canvas and a palette of violet and mint green paint, on a dark violet backgroundFree

Paintings drawn with code

Claude Opus 5.5 writes long Python programs that paint a picture pixel by pixel, with no image model.

"Write a Python script that paints a sunset over the sea pixel by pixel in the style of an oil painting, and saves it as a PNG file."

Try the prompt
A gear that is rusty iron on one half and polished chrome on the other, on a dark violet backgroundFree

Code moved to a new language

Claude Opus 5.5 translated HAProxy, a large web server program, from C to Rust in 9.5 hours. Claude Fable 5.1 took 12 hours. An early tester also moved 680,000 lines of code in under a day.

"Translate this C function to Rust and explain each change."

Try the prompt

Top features of Claude Opus 5.5

Find the top features of Claude Opus 5.5 in the cards below.

Long coding jobs

Claude Opus 5.5 can work on long coding tasks in large codebases: building features, fixing bugs, cleaning up old code and reviewing changes.

Adaptive thinking

Claude Opus 5.5 always thinks before it answers and decides how much to think. An effort setting steers how deep it goes.

1M token context window

Claude Opus 5.5 can read up to 1M tokens in one go, which is roughly 555,000 words.

Vision

Claude Opus 5.5 reads documents, charts and screenshots, and it scored 89.0% on the Chartography test with tools.

Clearer writing

Claude Opus 5.5 puts the key information first, uses less jargon and follows your writing rules.

Fast mode

On Anthropic's API, a fast mode runs Claude Opus 5.5 up to 2.5 times faster, at a higher price per token.

How much is Claude Opus 5.5?

Claude Opus 5.5 costs $4 per million input tokens and $20 per million output tokens on Anthropic's API. Cached input costs $0.20 per million tokens, and the Batch API costs half the normal price. This is lower than Claude Opus 5, which cost $5 for input and $25 for output.

You can also pay for a Claude Pro plan on claude.ai in order to access this model. It costs $20 a month, or $17 a month billed yearly. However, on AIFreeForever, you can already test this model for free.

The table below summarises the price of Claude Opus 5.5.

WherePriceCached inputContext
Claude Opus 5.5 API$4 input, $20 output per 1M tokens$0.20 per 1M tokens1M
Claude Pro plan on claude.ai$20 a month, or $17 a month billed yearlyNot billed by tokenDepends on plan
Claude Max and Ultra plans on claude.ai$100 or $200 a monthNot billed by tokenDepends on plan
AIFreeForever's Free AIFreeFree1M

For developers in need of this model, an Anthropic API key adds Claude Opus 5.5 to your own chatbot or app. It is also on Amazon Web Services, Google Cloud and Microsoft Azure. For the Claude Opus 5.5 chatbot on AIFreeForever, your message goes through our server to the official Claude Opus 5.5 API by Anthropic and the answer comes back in our chatbot.

Is there a free version of Claude Opus 5.5?

Yes. These are the real free ways to use Claude Opus 5.5 and other Claude models:

  • AIFreeForever's Free AI runs Claude Opus 5.5 in the chatbot at the top, with no login and no sign up.
  • The free plan of Claude on claude.ai gives you Claude Sonnet and Claude Haiku with an account. Claude Opus 5.5 starts on the Pro plan.

Get answers from Claude Opus 5.5 for free

Ask Claude Opus 5.5 a question, paste your code or add a file and get instant answers. Not satisfied? Compare your answers to other models for free.

Chat with Claude Opus 5.5

Claude Opus 5.5 benchmark scores

Claude Opus 5.5 scored higher than Claude Opus 5 and Claude Fable 5.1 on every test in its launch table. On Terminal-Bench 4.0, Claude Opus 5.5 got 66.4% and Claude Opus 5 got 52.3%.

The table below shows how Claude Opus 5.5 scored on well-known AI tests, and what each test checks.

BenchmarkWhat it testsScore
Intelligence IndexHard tests in reasoning, knowledge, coding and science, combined into one score59
Terminal-Bench 4.0Real tasks done by typing commands in a computer terminal66.4%
FrontierCode v1.1Hard coding tasks54.4%
CursorBench 4.0Coding tasks from the Cursor code editor57.8%
Humanity's Last Exam, with toolsVery hard questions written by experts in many subjects67.7%
OSWorld 2.1Using a computer to finish tasks across apps81.8%
GDPval-AA v2.1Real work tasks from many jobs, scored as a rating where higher is better1846
AutomationBenchFinishing work tasks in apps on its own40.0%
Terminal-Bench-Science 0.1Science tasks done in a computer terminal58.7%
Chartography, with toolsReading exact values from charts89.0%

This benchmark was extracted from Artificial Analysis and Anthropic.

GPT-6 Astra scored higher than Claude Opus 5.5 on two tests in the same table. On AutomationBench, GPT-6 Astra got 41.4% and Claude Opus 5.5 got 40.0%. On Terminal-Bench-Science 0.1, GPT-6 Astra got 64.6% and Claude Opus 5.5 got 58.7%.

What's new in Claude Opus 5.5 vs Claude Opus 5

Claude Opus 5.5 scored higher than Claude Opus 5 on every test below, and it costs less on the API. The biggest jump was in science tasks, where its score doubled from 29.0% to 58.7%.

The table below compares Claude Opus 5 with Claude Opus 5.5.

TestClaude Opus 5Claude Opus 5.5Change
Terminal-Bench 4.0Coding in a computer terminal52.3%66.4%+14.1 points
Terminal-Bench-Science 0.1Science tasks in a terminal29.0%58.7%+29.7 points
OSWorld 2.1Using a computer across apps74.0%81.8%+7.8 points
GDPval-AA v2.1Real work tasks, as a rating17081846+138
API price per 1M tokensInput and output$5 / $25$4 / $2020% lower

This benchmark was extracted from Anthropic.

Claude Opus 5.5 vs other top models

Claude Fable 5.1Claude Sonnet 5.5ChatGPT 5Gemini 3.5 Flash-Lite

If you are also wondering how Claude Opus 5.5 compares to other models close to it, we have prepared a comparison table below. Compare context, strength and image support for this model.

ModelContextImage inputStrength
Claude Opus 5.51MYesLong coding jobs and knowledge work
Claude Fable 5.11MYesHard reasoning and long tasks
Claude Sonnet 5.51MYesCoding and everyday work
ChatGPT 5400KYesDeep reasoning, tool use
Gemini 3.5 Flash-Lite1MYesFast answers, long documents

Claude Opus 5.5 vs other Claude models

Claude Opus 5.5 came out on September 22, 2026. Claude Fable 5.1 is Anthropic's model for the hardest reasoning and the longest agent tasks, and on the API it costs $10 for input and $50 for output per million tokens. Claude Sonnet 5.5 mixes speed and intelligence for everyday work, and Claude Haiku 5.5 is the fastest model in the family. All four have a context window of 1M tokens. The older Claude Sonnet 4.6 and Claude Haiku 4.5 are also on AIFreeForever. Claude Haiku 4.5 has a context window of 200K tokens.

How does Claude Opus 5.5 compare to ChatGPT 5

Claude Opus 5.5 has a context window of 1M tokens. ChatGPT 5 has a context window of 400K tokens. This means Claude Opus 5.5 can read a longer document in one message. Both models read images and both are made for hard questions.

How Claude Opus 5.5 works

Claude Opus 5.5 works by thinking before every answer. This is called adaptive thinking, and it cannot be switched off. Five effort levels decide how much it thinks: low, medium, high, xhigh and max, with medium as the default on Anthropic's API. Because it always thinks, Claude Opus 5.5 is slower to start than a small model, and it is at its best on long coding jobs, careful writing and hard questions.

Claude Opus 5.5 prompt examples

Each tab holds prompts made for Claude Opus 5.5. Copy one, paste it into the chat box and add your own file or text.

Free Claude Opus 5.5 Code Review Prompt

Review this code like a senior engineer. List the bugs first, then the risks, then the parts that are hard to read, and show a fixed version at the end: [paste your code]

Free Claude Opus 5.5 C to Rust Prompt

Translate this C function to Rust and explain each change: [paste the C function]

Free Claude Opus 5.5 Business Report Prompt

Turn these notes into a one page business report with a title, a three line summary at the top, headings and a short list of next steps: [paste your notes]

Free Claude Opus 5.5 Annual Report Prompt

Read the annual report I attached and write a half page summary for a busy manager. Put the three most important numbers first and explain each one in one sentence.

Free Claude Opus 5.5 Data Cleaning Prompt

Read the Excel file I attached. Tell me which column has missing values, which rows look like duplicates, and give me a cleaned table.

Free Claude Opus 5.5 Excel Formula Prompt

Write an Excel formula that adds up column C only where column A says North and column B is in March 2026. Explain each part of the formula.

Free Claude Opus 5.5 Chart Values Prompt

Look at the chart I attached. Read the exact value of each bar, put them in a table, and tell me which two values are closest.

Free Claude Opus 5.5 Dashboard Prompt

Read the dashboard screenshot I attached and write three short findings a manager should know, each with the number that supports it.

Free Claude Opus 5.5 Cover Letter Prompt

Write a clear cover letter for a junior data analyst job. Use these facts: I know SQL and Excel, I built a sales report for a local shop, and I finish my degree in June. Keep it under 250 words.

Free Claude Opus 5.5 Announcement Prompt

Write a short, friendly product announcement for a new feature that lets users export their data to CSV. Start with what the user gets, then how to use it in two steps.

Free Claude Opus 5.5 Browser Game Prompt

Make a simple block building game that runs in my browser, with a day and night cycle. Put it all in one HTML file.

Free Claude Opus 5.5 Three.js Prompt

Write a Three.js scene of a pelican riding a bicycle, in one HTML file I can open in my browser.

Download the complete Claude Opus 5.5 prompt guide

Claude Opus 5.5 FAQs

Is Claude Opus 5.5 free?

Yes. Claude Opus 5.5 is free on AIFreeForever with no login and no sign up.

Can I use Claude Opus 5.5 without logging in?

Yes. You can use Claude Opus 5.5 on AIFreeForever without logging in.

How do I use Claude Opus 5.5?

Type your question in the chat box at the top of the page and press Enter.

Who made Claude Opus 5.5?

Claude Opus 5.5 was made by Anthropic, the AI company behind the Claude models.

When was Claude Opus 5.5 released?

Anthropic released Claude Opus 5.5 on September 22, 2026.

How large is the Claude Opus 5.5 context window?

The Claude Opus 5.5 context window is 1M tokens. It can write up to 128K tokens in one answer.

Can Claude Opus 5.5 read images and PDFs?

Yes. Add an image or a PDF and ask Claude Opus 5.5 about it.

Is Claude Opus 5.5 better than Claude Fable 5.1?

Claude Opus 5.5 scored higher than Claude Fable 5.1 on every test in its launch table, such as Terminal-Bench 4.0, with 66.4% against 55.8%. On the API, Claude Opus 5.5 also costs less: $4 per million input tokens against $10.

Does Claude Opus 5.5 work in other languages?

Yes. Claude Opus 5.5 was tested in 15 languages. It scored 99.3% of its English score in Spanish, French, Arabic and Chinese, 99.2% in Japanese and Hindi, 99.1% in Korean, 98.6% in Bengali, 98.3% in Swahili and 96.3% in Yoruba.

Does Claude Opus 5.5 have a thinking mode?

Yes. Claude Opus 5.5 always thinks before it answers. This is called adaptive thinking, and it cannot be switched off. Five effort levels decide how much it thinks: low, medium, high, xhigh and max. Medium is the default on the API.

Can Claude Opus 5.5 read video or audio?

No. Claude Opus 5.5 reads text, images and PDFs, and it writes text. It does not read video or audio. Turn a recording into text with the @TranscribeSpeech skill by AIFreeForever, then ask Claude Opus 5.5 about it.

Is Claude Opus 5.5 open source?

No. Anthropic has not released the Claude Opus 5.5 model weights. You can use it through Anthropic's apps, Anthropic's API and cloud platforms, or for free on AIFreeForever.

Is the Claude Opus 5.5 chatbot on AIFreeForever safe to use?

Yes. Your message goes through our server to the official Claude Opus 5.5 API over HTTPS. Files you upload are never kept: they are held for at most 30 minutes, then deleted. Chats are kept only if you connect your email, for the 3, 7, 14 or 30 days you choose, and then they are deleted automatically from our Cloudflare storage. Privacy comes first on AIFreeForever.

Claude Opus 5.5 also got the best score of any model tested so far on Anthropic's automated behaviour audit, which covers nearly 2,000 test cases. It is the strongest Claude model on most honesty measures, and it tied Claude Fable 5.1 for the lowest prompt injection success rate in a Gray Swan test. In tests, it tried to cross its containment limits about 85% less often than Claude Opus 5. Source: Anthropic.

Are Claude Opus 5.5 AI answers 100% correct?

No. Claude Opus 5.5 can make mistakes, like every AI model. Its knowledge goes up to June 2026, so it may not know about newer events. Check important answers before you use them.

Use Claude Opus 5.5 free on AIFreeForever, with no login and no sign up.