Gemini Flash 3.8 model release (#63065)

Copilot-Session: cf2e091d-5a94-4e29-a003-e5739bd66c49

Author: sunbrye

content/copilot/reference/ai-models/model-hosting.md

@@ -84,6 +84,7 @@ Used for:
 * {% data variables.copilot.copilot_gemini_35_flash %}
 * {% data variables.copilot.copilot_gemini_36_flash %}
 * {% data variables.copilot.copilot_gemini_37_flash %}
+* {% data variables.copilot.copilot_gemini_38_flash %}
 
 {% data variables.product.prodname_copilot %} uses {% data variables.copilot.copilot_gemini %} models hosted on Google Cloud Platform (GCP). When using {% data variables.copilot.copilot_gemini %} models, prompts and metadata are sent to GCP, which makes the [following data commitment](https://cloud.google.com/vertex-ai/generative-ai/docs/data-governance): _{% data variables.copilot.copilot_gemini %} doesn't use your prompts, or its responses, as data to train its models._
 

content/copilot/reference/ai-models/supported-models.md

@@ -126,6 +126,7 @@ Some {% data variables.product.prodname_copilot_short %} models require minimum
 | {% data variables.copilot.copilot_gemini_35_flash %}     | `v1.115.0` | `17.14.22` or `18.1.0`         | `1.5.62` | `0.46.0` | `0.14.0` |
 | {% data variables.copilot.copilot_gemini_36_flash %}     | `v1.128.0` | `17.14.22` or `18.1.0`         | TBD | TBD | TBD |
 | {% data variables.copilot.copilot_gemini_37_flash %}     | `v1.128.0` | `17.14.22` or `18.1.0`         | TBD | TBD | TBD |
+| {% data variables.copilot.copilot_gemini_38_flash %}     | TBD | `17.14.22` or `18.1.0`         | TBD | TBD | TBD |
 | {% data variables.copilot.copilot_gpt_52_codex %}        | No minimum listed | `17.14.19` or `18.0.0`         | `1.5.61` | `0.45.0` | `0.13.0` |
 | {% data variables.copilot.copilot_gpt_53_codex %}        | `v1.104.1` | `17.14.19`                     | `1.5.61` | `0.45.0` | `0.13.0` |
 | {% data variables.copilot.copilot_gpt_54 %}              | `v1.104.1` | `17.14.19`                     | `1.5.66` | `0.47.0` | `0.15.0` |

content/copilot/reference/copilot-billing/models-and-pricing.md

@@ -116,6 +116,6 @@ You can view your current {% data variables.product.prodname_actions %} usage fo
 
 {% data variables.copilot.copilot_pro_short %} and {% data variables.copilot.copilot_pro_plus_short %} subscribers on **existing annual billing plans** using the **request-based billing** model have different model multipliers. See [AUTOTITLE](/copilot/reference/copilot-billing/request-based-billing-legacy/model-multipliers-for-annual-plans).
 
-[^gemini-flash-promo]: {% data variables.copilot.copilot_gemini_36_flash %} and {% data variables.copilot.copilot_gemini_37_flash %} are available at the promotional pricing of $0.75 per 1M input tokens, $0.075 per 1M cached input tokens, and $3.75 per 1M output tokens through December 31, 2026.
+[^gemini-flash-promo]: {% data variables.copilot.copilot_gemini_36_flash %}, {% data variables.copilot.copilot_gemini_37_flash %}, and {% data variables.copilot.copilot_gemini_38_flash %} are available at the promotional pricing of $0.75 per 1M input tokens, $0.075 per 1M cached input tokens, and $3.75 per 1M output tokens through December 31, 2026.
 
 [^gpt-56-sol-promo]: {% data variables.copilot.copilot_gpt_56_sol %} is available at promotional pricing, 50% off standard rates, through September 3, 2026. The default tier is $2.00 per 1M input tokens, $0.20 per 1M cached input tokens, $2.50 per 1M cache write tokens, and $10.00 per 1M output tokens. The long context tier is $4.00 per 1M input tokens, $0.40 per 1M cached input tokens, $5.00 per 1M cache write tokens, and $15.00 per 1M output tokens.

data/reusables/copilot/copilot-cloud-agent-non-auto-models.md

@@ -5,6 +5,7 @@
 * {% data variables.copilot.copilot_gemini_35_flash %}
 * {% data variables.copilot.copilot_gemini_36_flash %}
 * {% data variables.copilot.copilot_gemini_37_flash %}
+* {% data variables.copilot.copilot_gemini_38_flash %}
 * {% data variables.copilot.copilot_gpt_54_mini %}
 * {% data variables.copilot.copilot_gpt_56_luna %}
 * {% data variables.copilot.copilot_gpt_56_sol %}

data/tables/copilot/model-comparison.yml

@@ -120,6 +120,11 @@
   excels_at: Fast, reliable answers to lightweight coding questions
   further_reading: '[Gemini 3.7 Flash model card](https://storage.googleapis.com/deepmind-media/Model-Cards/Gemini-3-7-Flash-Model-Card.pdf)'
 
+- name: Gemini 3.8 Flash
+  task_area: Fast help with simple or repetitive tasks
+  excels_at: Fast, reliable answers to lightweight coding questions
+  further_reading: '[Gemini 3.8 Flash model card](https://storage.googleapis.com/deepmind-media/Model-Cards/Gemini-3-8-Flash-Model-Card.pdf)'
+
 # Microsoft
 - name: MAI-Code-1-Flash
   task_area: General-purpose coding and writing

data/tables/copilot/model-release-status.yml

@@ -119,6 +119,10 @@
   provider: 'Google'
   release_status: 'GA'
 
+- name: 'Gemini 3.8 Flash'
+  provider: 'Google'
+  release_status: 'GA'
+
 # Microsoft models
 - name: 'MAI-Code-1-Flash'
   provider: 'Microsoft'

data/tables/copilot/model-supported-clients.yml

@@ -158,6 +158,15 @@
   xcode: true
   jetbrains: true
 
+- name: Gemini 3.8 Flash
+  dotcom: false
+  cli: true
+  vscode: true
+  vs: true
+  eclipse: true
+  xcode: true
+  jetbrains: true
+
 - name: MAI-Code-1-Flash
   dotcom: true
   cli: true

data/tables/copilot/model-supported-plans.yml

@@ -124,6 +124,13 @@
   business: true
   enterprise: true
 
+- name: Gemini 3.8 Flash
+  pro: true
+  pro_plus: true
+  max: true
+  business: true
+  enterprise: true
+
 - name: GPT-5 mini
   pro: true
   pro_plus: true

data/tables/copilot/models-and-pricing.yml

@@ -343,6 +343,16 @@
   cached_input: $0.075
   output: $3.75
 
+- model: 'Gemini 3.8 Flash[^gemini-flash-promo]'
+  provider: google
+  release_status: GA
+  category: Versatile
+  threshold: 'Not applicable'
+  tier: 'Default'
+  input: $0.75
+  cached_input: $0.075
+  output: $3.75
+
 # xAI
 - model: 'Grok 4.5'
   provider: xai

data/variables/copilot.yml

@@ -210,6 +210,7 @@ copilot_gemini_31_pro: 'Gemini 3.1 Pro'
 copilot_gemini_35_flash: 'Gemini 3.5 Flash'
 copilot_gemini_36_flash: 'Gemini 3.6 Flash'
 copilot_gemini_37_flash: 'Gemini 3.7 Flash'
+copilot_gemini_38_flash: 'Gemini 3.8 Flash'
 # OpenAI GPT series:
 copilot_gpt_4o: 'GPT-4o'
 copilot_gpt_4o_mini: 'GPT-4o mini'