Grok: default model 'thinking' no longer exists, send button not found, follow-up prompts leak into output

[elyase]

Environment

• surf-cli v2.6.0
• macOS, Chrome
• Grok Premium account

Issues

1. Default model "thinking" no longer exists

surf grok --validate reports model mismatch — Grok's UI now shows:

• Auto (Chooses Fast or Expert)
• Fast (Quick responses)
• Expert (Thinks hard)
• Grok 4.20 Beta (4 Agents)

The previous default thinking / grok 4.1 thinking is gone. Running surf grok "prompt" without --model fails or returns unexpected results.

Workaround: surf grok "prompt" --model fast works.

2. Send button not found

surf grok --validate reports Send Button: Not Found. Queries still work (likely falling back to Enter key), but validation reports an error.

3. Suggested follow-up prompts leak into response

Grok now shows suggested follow-up prompts below responses. These get captured as part of the response text:

$ surf grok "say hello in 3 words" --model fast
Hello there, friend!
Share greetings in other languages
Fun icebreaker questions
Make it more playful

Expected output should only be Hello there, friend!

Validation output

$ surf grok --validate

Authenticated: Yes
Premium: Yes
Input Field: Found
Send Button: Not Found

Available Models: Auto, Fast, Expert, Grok 4.20Beta4 Agents
Expected Models: auto, fast, expert, thinking
Model Mismatch: Yes

Errors:
- Expected models not found: grok 4.1 thinking
- Unexpected models found: grok 4.20beta4 agents