Minor fix: gpt-4-1106-preview → gpt-4

We decided to make gpt-4 no longer default to gpt-4-1106-preview, which we've found performs worse on code interpretation tasks.

Important Note: This was not published from the repository. The last release, v0.1.16, was simply patched to not switch to gpt-4-1106-preview. The updates in the repo (and the commit associated with this release) are therefore out of sync with the binaries below.

We'll be back in sync by the next release of 0.2.0, the New Computer update.