GPT-5.6 Terra vs Gemini 4 Argon: scores, price and which to pick

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Our take

Gemini 4 Argon wins 4 of 4 categories and costs less: 1.1× cheaper for everyday text work. Easy pick.

Overall6096Best

Coding5484Best

Writing5395Best

Support5797Best

Value5086Best

Input / 1M$2.00$2.00

Output / 1M$12.00$10.00Best

Blended / 1M$4.50$4.00Best

Context window1.1MBest1M

Open weightsNoNo

Released9 Jul 202613 Oct 2026

Your monthly bill

Tasks per month50k

GPT-5.6 Terra$900

Gemini 4 Argon$800Cheapest

List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.