ChatGPT with GPT-6 Astra is one of the strongest AI assistants (from $20/month on ChatGPT Plus). Depending on what you do, another assistant can still be the better choice — for coding, free use, real-time information, research or self-hosting.
| Tool | Best for | Starting price | Free plan | Score |
|---|---|---|---|---|
| Claude Opus 5.5 | Coding & the hardest tasks | From $20/mo (Pro) | No | 98 |
| Gemini 4 Argon | Google’s newest flagship | $2/$10 per 1M tokens (API, until Nov 30) | No | 96 |
| Grok 4.7 | Real-time information | From $8/mo | Yes | 91 |
| Perplexity Pro | Research with sources | From $20/mo | Yes | 84 |
| DeepSeek V4.1 Flash | Open source & self-hosting | Free · API $0.30/$1.20 per 1M | Yes | 90 |
| Writingmate AI | Many models in one place | From $19.99/mo (annual) | No | 83 |

Claude Opus 5.5 is the highest-ranked publicly available model on the Artificial Analysis Intelligence Index (59), scores 89.9% on SWE-bench Pro and is included from the $20/month Claude Pro plan.

Gemini 4 Argon offers frontier-level quality, a 1M-token context window and full multimodal support via the Gemini API, from $2/$10 per 1M tokens.

Grok 4.7 has live X (Twitter) search built in; consumer plans from $8/month, API $2/$6 per 1M tokens.

An AI search engine that answers with links to its sources; Perplexity Pro from $20/month, free tier available.

DeepSeek V4.1 Flash is free to chat with at chat.deepseek.com, its weights are MIT-licensed for self-hosting, and the API costs only $0.30/$1.20 per 1M tokens.

Use Claude, GPT, Gemini and 350+ other models in one workspace, from $19.99/month billed yearly.
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Stay with ChatGPT if you want the most feature-complete assistant — voice, image generation and file analysis — and the best math results (GPT-6 Astra leads FrontierMath Tier 4 at 97.6%). See our GPT-6 Astra profile.
It depends on the job. Claude Opus 5.5 is the best choice for coding & the hardest tasks; Gemini 4 Argon is the best choice for google’s newest flagship; Grok 4.7 is the best choice for real-time information.
Yes — Grok 4.7, Perplexity Pro and DeepSeek V4.1 Flash have a free plan or free tier, with usage limits. The paid plans unlock higher limits and extra features.
We compared features, pricing and free plans from the providers' own pricing pages and documentation, and grouped the tools by the job they do best. Commissions never influence the selection or order.
How we compare: Prices and features are taken from the providers' pricing pages and documentation and can change — check the provider's site before buying. Commissions never influence our selection. Last updated: November 11, 2026.