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

Question 1

Which is better overall, Claude Opus 5 or GPT-5.6 Sol?

Accepted Answer

Claude Opus 5 has the higher preference Elo in our latest snapshot (1,624). “Better” still depends on coding, price, and latency — see the table.

Question 2

Which is better at coding, Claude Opus 5 or GPT-5.6 Sol?

Accepted Answer

Claude Opus 5 leads SWE-bench at 79.2% vs 77.6%. SWE-bench is one harness, not your repo.

Question 3

Which is cheaper to run in production?

Accepted Answer

GPT-5.6 Sol output tokens are $30/1M versus $50/1M. Input prices and retry rates still move the real bill.

Question 4

Which is faster, Claude Opus 5 or GPT-5.6 Sol?

Accepted Answer

GPT-5.6 Sol has the lower time-to-first-token (270 ms vs 310 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 1M.

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. Claude Opus 5 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	Claude Opus 5	Higher SWE-bench (79.2%).
High-volume chat	GPT-5.6 Sol	Lower output list price ($30/1M).
Voice / low-latency UI	GPT-5.6 Sol	Lower TTFT (270 ms).
Long-document RAG	GPT-5.6 Sol	Larger window (1.1M).
Screenshots / vision	Claude Opus 5	Both accept images. Defaulting to the higher-Elo side (Claude Opus 5).

Workload	Pick	Why
Repo / coding agents	Claude Opus 5	Higher SWE-bench (79.2%).
High-volume chat	GPT-5.6 Sol	Lower output list price ($30/1M).
Voice / low-latency UI	GPT-5.6 Sol	Lower TTFT (270 ms).
Long-document RAG	GPT-5.6 Sol	Larger window (1.1M).
Screenshots / vision	Claude Opus 5	Both accept images. Defaulting to the higher-Elo side (Claude Opus 5).

Claude vs GPT benchmark (2026)

Claude Opus 5

GPT-5.6 Sol

Which brand for which job

Frequently asked questions

Claude vs GPT benchmark (2026)

Claude Opus 5

GPT-5.6 Sol

Which brand for which job

Frequently asked questions