Google: Gemini 3.8 Flash
The Gemini 3.8 Flash is a large language model developed by Google that can handle various input modalities including text, image, video, file, and audio. It has a context length of 1 MB and supports tools and reasoning capabilities. Considering the pricing summary, users who need to process long inputs may find this model attractive due to its high context length. However, it is essential to note that its price point is on the higher end, with $0.75 per million input tokens and $3.75 per million output tokens. Despite its strong benchmark performance, a blended score of 93.4 across three independent benchmarks may not be enough to justify the cost for all users; those prioritizing affordability should look elsewhere.
Benchmark results
Independent, published benchmarks. Blended score 93.4 across 3 benchmarks, last refreshed 2026-09-04. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 96.8 |
| AI Index Coding | software engineering tasks | 100.0 |
| AI Index Agentic | multi-step tool-using tasks | 82.5 |
- Model ID
- google/gemini-3.8-flash
- Vendor
- Released
- September 2026
- Tokenizer
- Gemini
- Input Modalities
- text, image, video, file, audio
- Output Modalities
- text
- Max Output
- 65,536 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- ✓ accepts audio
- Moderated
- no
What it costs in practice
Computed from the current $0.75/M input and $3.75/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.03 |
| Classify 1,000 customer emails | 500k in / 50k out | $0.56 |
| A month of a busy support chatbot | 5M in / 2M out | $11.25 |
Strong choice for
Image Captioning
Transcription
Audio Summarization
TTS Replacement
Video Auto-Tagging
Trivia & General Knowledge
Category rankings
Where Google: Gemini 3.8 Flash places across the 56 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #1 | Image CaptioningVision · of 25 ranked | 121 |
| #2 | TranscriptionVoice · of 25 ranked | 123 |
| #2 | Video Auto-TaggingVideo · of 25 ranked | 123 |
| #3 | TTS ReplacementVoice · of 25 ranked | 115 |
| #4 | Audio SummarizationVoice · of 25 ranked | 161 |
| #4 | Trivia & General KnowledgePersonal · of 25 ranked | 122 |
| #6 | Short-Form SummarizationWriting · of 25 ranked | 132 |
| #6 | Email DraftingWriting · of 25 ranked | 128 |
| #6 | Language LearningEducation · of 25 ranked | 128 |
| #6 | Chat CompanionPersonal · of 25 ranked | 132 |
| #8 | Customer SupportBusiness · of 25 ranked | 135 |
| #9 | Video SummarizationVideo · of 25 ranked | 161 |
| #10 | JSON ExtractionData · of 25 ranked | 148 |
| #12 | Sales / Cold EmailBusiness · of 25 ranked | 124 |
| #12 | Resume WritingBusiness · of 25 ranked | 118 |
| #12 | Job Application DraftingBusiness · of 25 ranked | 124 |
| #12 | Journaling HelperPersonal · of 25 ranked | 124 |
| #12 | Recipe GenerationPersonal · of 25 ranked | 124 |
| #14 | Dataset AnnotationResearch · of 25 ranked | 144 |
| #15 | Regex WritingCode · of 25 ranked | 137 |
| #15 | Language TranslationWriting · of 25 ranked | 137 |
| #15 | Tutoring for KidsPersonal · of 25 ranked | 137 |
| #16 | Meeting NotesBusiness · of 25 ranked | 153 |
| #16 | SOP / Process DocsBusiness · of 25 ranked | 138 |
| #17 | Bulk Data LabelingData · of 25 ranked | 134 |
| #18 | Code DocumentationCode · of 25 ranked | 144 |
| #18 | Browser AutomationAgents · of 25 ranked | 174 |
| #19 | Frontend Component DesignCode · of 25 ranked | 148 |
| #19 | Marketing CopyWriting · of 25 ranked | 132 |
| #19 | Standardized Test PrepEducation · of 25 ranked | 132 |
| #19 | Diagram ExtractionVision · of 25 ranked | 150 |
| #19 | Screenshot DebuggingVision · of 25 ranked | 144 |
| #19 | Chart & Graph ReadingVision · of 25 ranked | 154 |
| #20 | Function / Tool CallingAgents · of 25 ranked | 155 |
| #20 | Fitness CoachingPersonal · of 25 ranked | 136 |
| #21 | SQL GenerationCode · of 25 ranked | 173 |
| #21 | CSV / Spreadsheet CleanupData · of 25 ranked | 154 |
| #21 | OCR / Document ParsingData · of 25 ranked | 147 |
| #21 | Table Extraction from PDFsData · of 25 ranked | 147 |
| #21 | Blog Post WritingWriting · of 25 ranked | 142 |
| #21 | Trip PlanningPersonal · of 25 ranked | 142 |
| #22 | Code CompletionCode · of 25 ranked | 133 |
| #22 | Data AnalysisData · of 25 ranked | 173 |
| #22 | Financial AnalysisProfessional · of 25 ranked | 161 |
| #22 | Math TutoringEducation · of 25 ranked | 149 |
| #22 | Experiment DesignResearch · of 25 ranked | 159 |
| #23 | CI/CD PipelinesCode · of 25 ranked | 146 |
| #23 | Physics TutoringEducation · of 25 ranked | 149 |
| #24 | Long-Document SummarizationWriting · of 25 ranked | 162 |
| #24 | Character RoleplayPersonal · of 25 ranked | 152 |
| #25 | Bug FixingCode · of 25 ranked | 183 |
| #25 | Unit Test GenerationCode · of 25 ranked | 156 |
| #25 | ETL ScriptingData · of 25 ranked | 156 |
| #25 | Medical Note SummarizationProfessional · of 25 ranked | 156 |
| #25 | History TutoringEducation · of 25 ranked | 146 |
| #25 | Scientific CodingResearch · of 25 ranked | 183 |
Similar models
Google: Gemini 3.8 Flash (batch)
Google: Gemini 3.7 Flash
Google: Gemini 3.7 Flash (batch)
Google: Gemini 3.6 Flash
Google: Gemini 3.6 Flash (batch)
Google: Gemini 3.5 Flash Lite
Quick answers
- How much does Google: Gemini 3.8 Flash cost?
- $0.75 per million input tokens and $3.75 per million output tokens.
- What is Google: Gemini 3.8 Flash's context window?
- 1,048,576 tokens, roughly 1,572 pages of text in a single request.
- Does Google: Gemini 3.8 Flash support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can Google: Gemini 3.8 Flash process images?
- Yes, it accepts image input.