# Gemini 3.6 Flash: 17% Fewer Tokens, Live in Copilot > Source: > Published: 2026-07-21 18:16:38+00:00 Google shipped **Gemini 3.6 Flash** today, July 21, 2026, and the timing matters. The flagship Gemini 3.5 Pro — announced at Google I/O 2026 in May — is still stuck in testing after falling short on coding performance and reliability. Flash, meanwhile, is here: cheaper than its predecessor, more efficient, and available in GitHub Copilot for Pro, Pro+, Max, Business, and Enterprise users on day one. If you’re running agentic workflows on 3.5 Flash, this is a straightforward upgrade. ## Gemini 3.6 Flash: Performance and Pricing Changes Gemini 3.6 Flash uses 17% fewer output tokens than 3.5 Flash on the Artificial Analysis Index — and in some DeepSWE coding tasks, the reduction reached 65%. Output pricing dropped from $9/1M to $7.50/1M tokens. Input remains at $1.50/1M. That 17% average isn’t marketing copy. At 10 million output tokens per day, you move from $90/day to $75/day — $450/month saved with a one-line model string change. Agents doing 100M tokens/month recover $4,500/month. The savings compound further because 3.6 Flash also completes more tasks on the first attempt, wasting fewer tokens on retries and restarts. On benchmarks that matter for agentic work: DeepSWE (autonomous software engineering) jumps from 37% to 49%; OSWorld Verified (computer-use tasks) climbs from 78.4% to 83%; MLE Bench (ML engineering) goes from 49.7% to 63.9%. The knowledge cutoff also advances from January 2025 to March 2026 — a 14-month jump that meaningfully reduces stale-knowledge hallucinations for many workloads. Related:[LLM API Costs Dropped 94%: What to Fix in Your Architecture Now] ## GitHub Copilot: Available Today, But Read the Fine Print Gemini 3.6 Flash is in [GitHub Copilot’s model picker](https://github.blog/changelog/2026-07-21-gemini-3-6-flash-is-now-available-in-github-copilot/) as of today across VS Code, JetBrains, Xcode, Eclipse, and the Copilot CLI. Individual-tier users (Pro, Pro+, Max) can select it immediately from the model dropdown. No API setup required. Enterprise and Business plan users face one extra step: an administrator must enable the “Gemini 3.6 Flash Preview” policy in Copilot settings before anyone in the org can access it. Also worth knowing — Copilot billing for this model moves to usage-based pricing at provider list rates, not the flat-rate subscription. Budget accordingly before enabling it org-wide. Related:[Kimi K2.7 Code Lands in GitHub Copilot: Open-Weight, Finally] ## One Breaking Change Before You Migrate The [Gemini API changelog](https://ai.google.dev/gemini-api/docs/changelog) for 3.6 Flash deprecates the `temperature` , `top_p` , and `top_k` sampling parameters. If your integration passes these, the API will reject the request after you switch model IDs. Fix it first: ``` # Before (3.5 Flash) — breaks on 3.6 Flash response = client.models.generate_content( model="gemini-3.5-flash", contents=prompt, config={"temperature": 0.7, "top_p": 0.9} ) # After (3.6 Flash) — remove deprecated sampling params response = client.models.generate_content( model="gemini-3.6-flash", contents=prompt ) ``` The parameter removal is intentional — 3.6 Flash uses configurable reasoning effort instead of raw sampling controls. Review the changelog for migration guidance before touching production. ## Pro Is Still Delayed. Gemini 4 Is Next. 3.6 Flash isn’t a routine model bump — it’s Google keeping developer momentum alive while the flagship gets rebuilt. Gemini 3.5 Pro was supposed to ship in June 2026 after its [I/O announcement](https://9to5google.com/2026/07/16/gemini-3-5-pro-delays/). Internal testing found coding performance, hallucinations, and multi-step reasoning all below the bar set at the keynote. It’s still in testing as of today, with no hard ship date. In the same [blog post announcing 3.6 Flash](https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-6-flash-3-5-flash-lite-3-5-flash-cyber/), Google teased Gemini 4 as “the most ambitious pre-training run yet” — no specs, no timeline, just a signal that the roadmap hasn’t stopped. The clear implication: Flash is doing the work right now, Pro is on hold, and the next major bet is Gemini 4. If you’re planning infrastructure around a Pro-tier Gemini model, that timeline is still genuinely unclear. ## Key Takeaways - Gemini 3.6 Flash ships today with 17% fewer output tokens and lower pricing ($7.50/1M output vs $9/1M) — a free efficiency upgrade for anyone on 3.5 Flash. - GitHub Copilot integration is live across all paid tiers; Enterprise and Business admins must enable the Preview policy and account for usage-based billing. - Before migrating, remove `temperature` ,`top_p` , and`top_k` from your API calls — these parameters are now deprecated and will break requests on 3.6 Flash. - Gemini 3.5 Pro is still delayed with no firm ship date; Flash is carrying Google’s developer lineup for now. - Gemini 4 was teased in today’s announcement — described as “the most ambitious pre-training run yet,” with no timeline given.