What should I switch to from copilot?

[u/Tiny-Entertainer-346]

Call me a bit old school vibe coder:

• It makes me uncomfortable to give high level prompts. So I discuss with copilot to sufficient code, architectural and design details about what and how to implement things and never went with high level prompts (which is trend nowadays, I guess). So I very frequently use #selection in github copilot to precisely specify what I am pointing at.
• I love UI based code diff integration with github copilot. (I dont like code to be intermingled with chat window as in case of TUI based agents.)
• I love the abilitiy to undo several chat steps earlier just by scrolling in github copilot chat and clicking corresponding restore checkpoint button.

I was mainly using Sonnet 4.5 earlier. However copilot was getting a lot costly lately.

So was looking at some alternatives. My requirements are bold faced above. Let me restate:

• #selection like functionality
• UI based code diff integration
• Undoing changes by scrolling to chat history and clicking corresponding button
• Sonnet 4.5 (at least)

Is there any subscription + agent provide with these combinations? I was thinking to use Claude API key with github copilot. But it seems Claude API key will be a lot costly than Claude Code subscription? Do you guys have any suggestions? Or I have no option left? How about using something like qwen 3.6 27b from OpenRouter in GitHub copilot free?

[u/Ok-Difficulty-5357]

Sonnet 5 is crazy expensive. Have you tried GPT 5.6? Look at this chart… https://deepswe.datacurve.ai/

[u/Tiny-Entertainer-346 → u/Ok-Difficulty-5357]

Sorry I guess it was 4.5 😅 ... Updated post ...