Chatbots · Head-to-head
GPT-5.6 Sol vs Grok
GPT-5.6 Sol vs Grok: pricing, features, and which to pick in 2026.
The verdict
Pick GPT-5.6 Sol if…
- →overall capability matters more than price (AI Score 9.1 vs 8.7)
- →your primary use case is development and agentic-workflow teams evaluating a frontier model family they can route by task difficulty and token cost.
Pick Grok if…
- →you need a genuinely free option
- →budget is the constraint
- →your primary use case is people who want grok 4.6 in chat and need a clear map of free, supergrok, supergrok plus, heavy, and the api.
- →you need: research
Side-by-side specs
| Spec | GPT-5.6 Sol | Grok |
|---|---|---|
| Category | Chatbots | Chatbots |
| Pricing model | paid | freemium |
| Headline pricing | API usage-based: Sol $5/$30, Terra $2.50/$15, Luna $1/$6 per 1M tokens | Free + SuperGrok $30/mo + SuperGrok Plus $100/mo + Heavy $300/mo |
| Free tier | — | Yes — a limited grok.com tier with web/X search, voice, and connectors. Caps change; check x.ai/pricing. |
| AI Score | 9.1/10 | 8.7/10 |
| Best for | Development and agentic-workflow teams evaluating a frontier model family they can route by task difficulty and token cost. | People who want Grok 4.6 in chat and need a clear map of Free, SuperGrok, SuperGrok Plus, Heavy, and the API. |
| Editor's pick | ✓ Yes | ✓ Yes |
| Use cases | development agents | research agents development |
| Date added | 2026-06-27 | 2026-03-15 |
Pros and cons
GPT-5.6 Sol
Chatbots · paid
Pros
- ✓Three-tier family lets you match model cost to task difficulty instead of overpaying
- ✓Claimed state-of-the-art on Terminal-Bench, a meaningful real-world coding/agentic benchmark
- ✓Luna tier ($1/$6 per 1M tokens) is genuinely cheap for a current-generation model
- ✓Strong focus on agentic, long-horizon workflows rather than just chat
Cons
- ×Launched in limited preview — not broadly available, so you can't reliably build production on it yet
- ×Sol's $5/$30 pricing is premium; costs add up fast on token-heavy agentic loops
- ×Cybersecurity/dual-use framing and gov coordination signal tighter usage gating than a normal release
- ×Benchmark claims are vendor-reported at launch; independent verification is still pending
Grok
Chatbots · freemium
Pros
- ✓Current flagship is documented as Grok 4.6 with published API prices
- ✓SuperGrok Plus fills the old $30-to-$300 gap with a published $100 mid-tier
- ✓X search is a first-party tool, not a third-party plugin
- ✓Grok Build and Grok Bot give two other official places to use the same lab
Cons
- ×Grok Bot and in-chat Build Mode are still Heavy (or top Cursor for Bot), not SuperGrok or SuperGrok Plus
- ×API realtime answers require search tools; the raw model cutoff is February 1, 2026
- ×Weekly usage is one shared pool across Chat, Imagine, Voice, and Build, so video or Build can spend the week quickly
- ×Chat, Build, and Bot are three products with three access rules
Related comparisons
Updated 2026-08-17. Spec data sourced from official product pages and tracked in our public directory at /tools.