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Gemini 3.8 Flash

ActiveGooglegoogle/gemini-3-8-flash2 platforms

What breaksAdd its dates to my calendar
Next shutdown
None setNo date on 2 platforms
Arena Text
1,497#7 of 128 · Arena
GPQA Diamond
95.4%#4 of 108 · Epoch AI
List price · $ per 1M
$0.75 in $3.75 outGemini API · cached input $0.075
Context window
1MMax output 65.5K tokens

Dates on every platform

2 listings · a floor is the earliest possible date
Gemini 3.8 Flash on each platform: model ID, status, dates, replacement and source
PlatformModel ID and statusDeprecatedShuts downReplacement
Gemini APIGoogle: Gemini deprecations (opens in a new tab) · checked Oct 14, 2026gemini-3.8-flashActive–None set–
Google Vertex AIGoogle Cloud: Model versions and lifecycle (opens in a new tab) · checked Oct 14, 2026gemini-3.8-flashActive–None set–

What breaks when you move off Gemini 3.8 Flash

  • Pricing

    Per-token cost doubles from January 1, 2027.

    Gemini 3.8 Flash, Gemini 3.6 Flash · Gemini API ·

  • Pricing

    Per-token cost doubles from January 1, 2027.

    Gemini 3.8 Flash, Gemini 3.7 Flash · Google Vertex AI ·

  • Parameters

    The minimal thinking level returns an error. Use low, medium or high.

    Gemini 3.8 Flash · Gemini API, Google Vertex AI ·

  • Parameters

    Replace thinking_budget with thinking_level, and remove sampling parameters, candidate_count and prefilled model turns.

    Gemini 3.8 Flash · Gemini API, Google Vertex AI ·

  • Behavior

    The model can use more tokens on long, complex tasks by design.

    Gemini 3.8 Flash · Gemini API, Google Vertex AI ·

Intelligence

Third-party results, credited below
Third-party benchmark scores for Gemini 3.8 Flash
BenchmarkPublisherScoreRankPublished
Arena TextArena1,497 ± 2#7 of 128Oct 8, 2026
GPQA DiamondEpoch AI95.4% ± 1.4%#4 of 108Sep 2, 2026
Arena WebDevArena1,584 ± 4#19 of 69Oct 8, 2026
Arena AgentArena0 ± 0#12 of 35Oct 12, 2026
FrontierMath Tier 4Epoch AI22.0% ± 6.5%#39 of 58Sep 2, 2026
FrontierMath Tiers 1-3Epoch AI68.4% ± 2.8%#25 of 71Sep 2, 2026
OTIS Mock AIME 2024-2025Epoch AI98.9% ± 0.9%#14 of 105Sep 2, 2026
SimpleQA VerifiedEpoch AI69.7% ± 1.5%#8 of 68Sep 2, 2026

Arena (arena.ai), https://arena.ai/leaderboard

Epoch AI, ‘Capabilities & benchmarking’. Published online at epoch.ai. Retrieved from ‘https://epoch.ai/benchmarks’ [online resource].

List prices

$ per 1M tokens, with each price’s source
List prices per 1M tokens, in US dollars
PlatformInputCachedOutputIn effectSource
Gemini APIgemini-3.8-flash$1.50$0.15$7.50Jan 1, 2027ScheduledGoogle: Gemini Developer API pricing (opens in a new tab)
Gemini APIgemini-3.8-flash$0.75$0.075$3.75Sep 2, 2026 to Jan 1, 2027Current · Introductory price.Google: Gemini Developer API pricing (opens in a new tab)
Google Vertex AIgemini-3.8-flash$1.50$0.15$7.50Jan 1, 2027Scheduled · Global endpoint price; regional endpoints cost more.Google Cloud: Agent Platform pricing (opens in a new tab)
Google Vertex AIgemini-3.8-flash$0.75$0.075$3.75Sep 2, 2026 to Jan 1, 2027Current · Introductory price. Global endpoint price; regional endpoints cost more.Google Cloud: Agent Platform pricing (opens in a new tab)

Change history

ShutdownGemini 3.7 Flash retires on Agent PlatformGoogle Vertex AI

Google retires gemini-3.7-flash on Gemini Enterprise Agent Platform and recommends gemini-3.8-flash. The Gemini API already routes this ID to Gemini 3.8 Flash.

Platform
Google Vertex AI
Replacement
Gemini 3.8 Flash

Source: Google Cloud, Model versions and lifecycle (opens in a new tab); Google, Gemini API release notes (opens in a new tab)

Price changeGemini 3.8 Flash and 3.6 Flash introductory prices end on the Gemini APIGemini API1 break

Standard prices for gemini-3.8-flash and gemini-3.6-flash take effect on January 1, 2027, double the introductory rates.

Platform
Gemini API
  • PricingPer-token cost doubles from January 1, 2027.

Source: Google, What's new in Gemini 3.8 Flash (opens in a new tab); Google, Gemini Developer API pricing (opens in a new tab)

Price changeGemini 3.8 Flash and 3.7 Flash introductory prices end on Agent PlatformGoogle Vertex AI1 break

Standard prices for gemini-3.8-flash and gemini-3.7-flash take effect on January 1, 2027, double the introductory rates.

Platform
Google Vertex AI
  • PricingPer-token cost doubles from January 1, 2027.

Source: Google Cloud, Agent Platform pricing (opens in a new tab)

ShutdownGemini 3.6 Flash retires on Agent PlatformGoogle Vertex AI1 break

Google retires gemini-3.6-flash on Gemini Enterprise Agent Platform and recommends gemini-3.8-flash.

Platform
Google Vertex AI
Replacement
Gemini 3.8 Flash
  • BehaviorGemini 3.8 Flash can use more tokens on long, complex tasks by design.

Source: Google Cloud, Model versions and lifecycle (opens in a new tab); Google, What's new in Gemini 3.8 Flash (opens in a new tab)

ShutdownGemini 2.5 Pro, Flash and Flash-Lite retire on Agent PlatformGoogle Vertex AI2 breaks

Google retires gemini-2.5-pro, gemini-2.5-flash and gemini-2.5-flash-lite on Gemini Enterprise Agent Platform. Gemini 3.8 Flash is the first replacement Google lists for each.

Platform
Google Vertex AI
Replacement
Gemini 3.8 Flash
  • AvailabilityRequests to these model IDs on Agent Platform stop working after the retirement date.
  • ParametersReplacement models from Gemini 3.6 Flash on ignore temperature, top_p and top_k and reject a request that ends with a model turn.

Source: Google Cloud, Model versions and lifecycle (opens in a new tab); Google Cloud, Gemini 2.5 Pro (opens in a new tab); Google Cloud, Gemini Enterprise Agent Platform release notes (opens in a new tab); Google, What's new in Gemini 3.6 Flash and 3.5 Flash-Lite (opens in a new tab)

RedirectGemini 3.7 Flash requests now go to Gemini 3.8 FlashGemini API1 break

Google deprecated gemini-3.7-flash on the Gemini API and routes its requests to gemini-3.8-flash without an error. Responses now come from a different model.

Platform
Gemini API
Replacement
Gemini 3.8 Flash
Announced
  • BehaviorOutputs, token use and latency follow Gemini 3.8 Flash, which can use more tokens on long, complex tasks by design.

Source: Google, Gemini API release notes (opens in a new tab); Google, Gemini deprecations (opens in a new tab); Google, What's new in Gemini 3.8 Flash (opens in a new tab)

ReleaseGemini 3.8 Flash releasedGemini API, Google Vertex AI3 breaks

Google released Gemini 3.8 Flash at an introductory price through December 31, 2026.

Platform
Gemini API, Google Vertex AI
  • ParametersThe minimal thinking level returns an error. Use low, medium or high.
  • ParametersReplace thinking_budget with thinking_level, and remove sampling parameters, candidate_count and prefilled model turns.
  • BehaviorThe model can use more tokens on long, complex tasks by design.

Source: Google, Gemini API release notes (opens in a new tab); Google, What's new in Gemini 3.8 Flash (opens in a new tab); Google Cloud, Gemini Enterprise Agent Platform release notes (opens in a new tab)

ShutdownGemini 2.5 Computer Use Preview shut down on the Gemini APIGemini API

gemini-2.5-computer-use-preview-10-2025 stopped serving. Google points to Gemini 3.8 Flash and other Gemini 3 models with built-in computer use.

Platform
Gemini API
Replacement
Gemini 3.8 Flash

Source: Google, Gemini 2.5 Computer Use Preview (opens in a new tab); Google, Gemini deprecations (opens in a new tab)

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