Name: Grok vs ChatGPT benchmark (2026)
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

Question 1

Which is better overall, Grok 4.6 or GPT-5.6 Sol?

Accepted Answer

GPT-5.6 Sol has the higher preference Elo in our latest snapshot (1,608). “Better” still depends on coding, price, and latency — see the table.

Question 2

Which is better at coding, Grok 4.6 or GPT-5.6 Sol?

Accepted Answer

GPT-5.6 Sol leads SWE-bench at 77.6% vs 69.1%. SWE-bench is one harness, not your repo.

Question 3

Which is cheaper to run in production?

Accepted Answer

Grok 4.6 output tokens are $6/1M versus $30/1M. Input prices and retry rates still move the real bill.

Question 4

Which is faster, Grok 4.6 or GPT-5.6 Sol?

Accepted Answer

Grok 4.6 has the lower time-to-first-token (195 ms vs 270 ms). Tokens/sec is a separate column if you care about long completions.

Question 5

Which has the larger context window?

Accepted Answer

GPT-5.6 Sol accepts 1.1M tokens versus 500k.

Question 6

Can I self-host either model?

Accepted Answer

Neither model is marked open-weights here. You are comparing hosted APIs.

Question 7

Are these scores from CompareLLM’s own evals?

Accepted Answer

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

Question 8

What does preference Elo mean on this page?

Accepted Answer

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Grok 4.6 and GPT-5.6 Sol Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Workload	Pick	Why
Repo / coding agents	GPT-5.6 Sol	Higher SWE-bench (77.6%).
High-volume chat	Grok 4.6	Lower output list price ($6/1M).
Voice / low-latency UI	Grok 4.6	Lower TTFT (195 ms).
Long-document RAG	GPT-5.6 Sol	Larger window (1.1M).
Screenshots / vision	GPT-5.6 Sol	Both accept images. Defaulting to the higher-Elo side (GPT-5.6 Sol).

Workload	Pick	Why
Repo / coding agents	GPT-5.6 Sol	Higher SWE-bench (77.6%).
High-volume chat	Grok 4.6	Lower output list price ($6/1M).
Voice / low-latency UI	Grok 4.6	Lower TTFT (195 ms).
Long-document RAG	GPT-5.6 Sol	Larger window (1.1M).
Screenshots / vision	GPT-5.6 Sol	Both accept images. Defaulting to the higher-Elo side (GPT-5.6 Sol).

Grok vs ChatGPT benchmark (2026)

Grok 4.6

GPT-5.6 Sol

Which brand for which job

Frequently asked questions

Grok vs ChatGPT benchmark (2026)

Grok 4.6

GPT-5.6 Sol

Which brand for which job

Frequently asked questions