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Gemini 3.8 Flash

Google DeepMind · 2026-09-02

Gemini 3.8 Flash is Google's September 2026 multimodal model for long-horizon software engineering and enterprise workflows. It supports low, medium, and high thinking levels, defaults to medium, and has a 1,048,576-token input context limit.

Benchmark scores

BenchmarkScore
AA-Briefcase Elo1202
AA-Briefcase v1.1 Elo1202
AA-LCR v1.184.0
AA-Omniscience Index29.6
Agent Red Teaming k=100 (CAIS)29.8
ALE-Bench2182
Antidote: Everyday Edition1087
Arena Code WebDev — Brand & Marketing1537
Arena Code WebDev — Consumer Product1524
Arena Code WebDev — Content Creation Tools1530
Arena Code WebDev — Data & Analytics1553
Arena Code WebDev — Gaming1616
Arena Code WebDev — HTML1608
Arena Code WebDev — React1558
Arena Code WebDev — Reference-Based Design1598
Arena Code WebDev — Simulations1590
Arena Text — Business, Management & Financial Ops (No Style Control)1493
Arena Text — Chinese (No Style Control)1556
Arena Text — Creative Writing (No Style Control)1498
Arena Text — English (No Style Control)1501
Arena Text — Entertainment, Sports & Media (No Style Control)1467
Arena Text — Exclude Ties (No Style Control)1510
Arena Text — Exclude Ties (Style Controlled)1512
Arena Text — Expert (No Style Control)1501
Arena Text — Hard Prompts (No Style Control)1508
Arena Text — Hard Prompts English (No Style Control)1512
Arena Text — Instruction Following (No Style Control)1493
Arena Text — Legal & Government (No Style Control)1488
Arena Text — Life, Physical & Social Science (No Style Control)1508
Arena Text — Longer Query (No Style Control)1506
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