Google announced Gemini 4 Argon on September 30, 2026, as its new frontier large language model optimized for long-horizon software engineering, enterprise knowledge work, and cybersecurity defense. The model features an industry-leading 1-million-token output limit and leads benchmarks such as DeepSWE v1.1 at 77.9%, but remains restricted to vetted participants in the Fairwind Program and select government testers to allow safety iteration. Broader availability is slated to begin with paid API users and Google AI Ultra subscribers at introductory pricing of $2 per million input tokens and $10 per million output tokens before wider public access. Trader sentiment reflects the phased rollout timeline, competitive positioning against recent models from OpenAI and Anthropic, and the absence of a firm public launch date amid ongoing guardrail testing.