We are open about the fact that Signal & Form uses Claude, made by Anthropic, as its primary AI tool. Kavan Sohal, who runs the firm, uses it daily for research, drafting, and building client workflows, and uses ChatGPT alongside it for other jobs. Using a tool every day comes with an obligation to be honest about its limits. Claude is not better than ChatGPT for every business. The right choice depends on the work.
This comparison was updated on October 7, 2026. Product facts are linked to vendor sources. Where we give an opinion, we say so.
Key Takeaway
Short version: Claude is our pick when written work and careful reasoning are the product. ChatGPT is our pick when you want the widest set of features in one app, including image generation, or when your team already uses it.
The current models
Both companies replaced their lineups in the last few weeks. Anthropic released Claude Opus 5.5 on September 22, which it says performs at the level of its top Claude Fable 5.1 model on most work and costs 40 percent less to run than Opus 5. Sonnet 5.5 followed on September 28 and Haiku 5.5 on October 7. OpenAI released GPT-6 Sol and GPT-6 Luna on September 22, and on October 7 began rolling GPT-6 out to everyone in ChatGPT, on free and paid plans.
Source: Anthropic, Claude Opus 5.5 (September 2026)
Source: Anthropic, Claude release notes
Source: OpenAI, GPT-6 in ChatGPT for all plans (October 7, 2026)
Model names change every few months, so do not choose on the model alone. Choose on how each product fits your work, and re-test when a new model ships.
Where Claude wins (our view)
Long-form writing and document work
In our day-to-day use, Claude produces long documents that need less restructuring: proposals, reports, policies, and articles. It holds a consistent voice across a long piece and follows a detailed style guide closely. That is an opinion from our own use, not a benchmark, and the best way to test it is on your own documents.
Context matters here too. Anthropic's pricing page lists up to 1 million tokens of context on every plan, varying by model, which means Claude can work with a long contract, a brand guide, and several examples in one conversation.
Source: Anthropic, Claude plans and pricing
Following detailed instructions
When a brief has specific formatting, tone, and structure requirements, Claude tends to stick to it. That makes it a good fit for repeatable work: templated reports, proposal sections, and any workflow where predictable output matters more than creative variety. Anthropic's Agent Skills format, now an open standard, is built for exactly this: writing down how your team does a task so the AI follows it the same way every time.
Source: Agent Skills open standard, agentskills.io
Where ChatGPT wins
Breadth of features in one app
ChatGPT puts the widest range of features in one place: image generation, data analysis on uploaded files, web search, deep research, and agent mode. If your team wants one tool that does a bit of everything, it is the easier default.
Image generation
If visual content is a regular part of your work, such as social graphics, mockups, or product imagery, ChatGPT's built-in image generation is a real advantage. Claude's strengths are in writing, analysis, and documents.
Familiarity
Many people on your team have already used ChatGPT personally. That lowers the training curve when you roll out an AI assistant. Claude may need more introduction.
Custom GPTs are changing
One caution if your business has built custom GPTs: OpenAI is retiring them on December 11, 2026 in favour of plugins built on skills. GPT instructions can migrate as a skill, but custom actions may need to be rebuilt. Plan the move now rather than in December.
Source: Virtualization Review, OpenAI to retire custom GPTs (September 2026)
Where they are roughly equal
For everyday tasks such as summarizing email, drafting short messages, brainstorming, and simple spreadsheet work, both are good enough that the choice barely matters. Both also connect to other business tools through the Model Context Protocol, the open standard now governed under the Linux Foundation's Agentic AI Foundation.
Source: Anthropic, donating MCP to the Agentic AI Foundation
What they cost
The entry paid plans are the same price, so cost should not decide this. As of October 7, 2026, in US dollars:
- Claude: Pro is US$20 a month, or US$17 a month billed annually. Max starts at US$100 a month. Team standard seats are US$25 per user per month, or US$20 billed annually, with premium seats at US$125 or US$100. The free plan includes Sonnet and Haiku but not Opus.
- ChatGPT: Plus is US$20 a month. Pro comes in US$100, US$200, and US$500 tiers. ChatGPT Business standard seats are about US$25 per user per month, or US$20 billed annually, with premium seats at US$125 or US$100.
Source: Anthropic, Claude plans and pricing
Source: The Next Web, OpenAI Pro plans (September 2026)
Source: AI Business, ChatGPT Business premium seats
Prices change often. Confirm on the vendor's page before you buy, and remember that US-dollar plans cost more in Canadian dollars at the current exchange rate.
Key Takeaway
The best AI tool for your business is the one your team will use every day. A "worse" tool used daily beats a "better" one nobody opens.
Our recommendation by business type
Content-heavy businesses (agencies, consultancies, professional services): start with Claude. Writing quality and instruction-following matter most when written work is what you sell.
Visual businesses (design studios, ecommerce, social-first brands): start with ChatGPT for its image generation and broad feature set.
Technical businesses (SaaS, development shops): either works. Trial both on real tasks for a week.
Teams new to AI: start with whichever one your team already knows, usually ChatGPT, and add the second when you hit a real limit.
Why we chose Claude
Most of Signal & Form's work is long-form: consulting deliverables, content strategy, and written procedures that AI tools and people both follow. Claude fits that work best in our experience. We still use ChatGPT for image generation and some quick research, and plenty of businesses end up using both.
For a three-way comparison that includes Google Gemini and Microsoft 365 Copilot, read our ChatGPT vs Claude vs Gemini guide. If you want help choosing based on your actual workflows, personal AI coaching or an AI readiness assessment will get you to an answer faster than months of trial and error.
Not sure which AI tool fits your business? Book a free call and we will help you choose based on your actual workflows.
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