Gemini 3.8 Flash

google/gemini-3.8-flash-20260902

Gemini 3.8 Flash is a model from Google. It accepts text, image, video, file, and audio inputs and generates text outputs. It supports a context length of 1,048,576 tokens, tools, and reasoning.

  • tool use
  • structured outputs
  • reasoning

At a glance

providergoogle
releasedSep 2, 2026
context1.0M
input / M$0.83

Specifications

What the API gives you

Context window
1.0M tokens
Max output
66K tokens
Input price
$0.83 / 1M tokens
Output price
$4.13 / 1M tokens
Cache read
$0.083 / 1M tokens
Modalities
text, image, video, file, audio → text
Knowledge cutoff
—
Released
Sep 2, 2026

Measured evidence

Public benchmark record

Design Arena Coding
1304 Elo2026-10-20
Design Arena Full-stack Agent
1244 Elo2026-10-14
Design Arena UI
1318 Elo2026-10-20
Design Arena Web-app Agent
1237 Elo2026-10-20
Design Arena Website
1301 Elo2026-10-20
FACTS Grounding
73.1%2026-09-03evaluated 2026-09-03
FrontierMath Tiers 1-3 (Epoch AI)‡
68.4% ± 2.82026-09-02high effort, evaluated 2026-09-02
GPQA Diamond (Epoch AI)‡
95.4% ± 1.42026-09-02high effort, evaluated 2026-09-02
LiveBench Agentic Coding
54.2%2026-10-18
LiveBench Coding
72.5%2026-10-18
LiveBench Data Analysis
54.0%2026-10-18
LiveBench Instruction Following
81.4%2026-10-18
LiveBench Language
87.8%2026-10-18
LiveBench Math
91.6%2026-10-18
LiveBench Reasoning
89.3%2026-10-18
LMArena Agent‡
3.72026-10-19high effort
LMArena Agent Bash Recovery‡
-0.72026-10-08high effort
LMArena Agent Steerability‡
1.42026-10-19high effort
LMArena Agent Task Outcome‡
42026-10-19high effort
LMArena Agent Tool Hallucination‡
0.62026-10-19high effort
LMArena Creative Writing‡
1492 Elo2026-10-15high effort
LMArena Instruction Following‡
1491 Elo2026-10-15high effort
LMArena Long Query‡
1507 Elo2026-10-15high effort
LMArena Math‡
1527 Elo2026-10-15high effort
LMArena Text‡
1496 Elo2026-10-15high effort
LMArena Text Factuality‡
1474 Elo2026-10-15high effort
LMArena Vision‡
1291 Elo2026-10-19high effort
LMArena Vision Diagrams‡
1333 Elo2026-10-19high effort
LMArena Vision OCR‡
1316 Elo2026-10-19high effort
LMArena WebDev‡
1585 Elo2026-10-19high effort
LMArena WebDev Image-to-Web‡
1593 Elo2026-10-19high effort
OTIS Mock AIME (Epoch AI)‡
98.9% ± 0.92026-09-02high effort, evaluated 2026-09-02
SimpleQA Verified (Epoch AI)‡
69.7% ± 1.52026-09-02high effort, evaluated 2026-09-02
Terminal-Bench (4.0)‡
19.1%2026-10-20mini-SWE-agent, high effort, evaluated 2026-09-03

LMArena data licensed CC-BY-4.0. Aider (Apache-2.0) and SWE-bench (MIT) are open. Design Arena uses blind human preference. ‡ Submitted scaffold plus model result. Compare the harness and effort settings, not only the model name.

Task evidence

How broad is the support?

Each status is exact to this model version and the selected task. Official release claims remain provisional.

  • Best LLM for Competition MathEstablished evidence

    100% of intended weighted task evidence across 4 independent sources. 6 of 6 configured evaluation feeds currently have results.

  • Best LLM for Business WritingEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for Logic & Problem SolvingEstablished evidence

    100% of intended weighted task evidence across 3 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for Marketing CopyEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for Chat & RoleplayEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for Creative WritingEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

Show all 45 tasks
  • Best LLM for Frontend & UIEstablished evidence

    100% of intended weighted task evidence across 3 independent sources. 6 of 6 configured evaluation feeds currently have results.

  • Best LLM for WritingEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for Roleplay & CharacterEstablished evidence

    100% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for Math & ReasoningEstablished evidence

    100% of intended weighted task evidence across 5 independent sources. 7 of 7 configured evaluation feeds currently have results.

  • Best LLM for a General AssistantEstablished evidence

    100% of intended weighted task evidence across 3 independent sources. 6 of 6 configured evaluation feeds currently have results.

  • Best LLM for Agentic CodingEstablished evidence

    80% of intended weighted task evidence across 4 independent sources. 7 of 7 configured evaluation feeds currently have results.

  • Best LLM for Code CompletionEstablished evidence

    79% of intended weighted task evidence across 2 independent sources. 3 of 3 configured evaluation feeds currently have results.

  • Best LLM for Autonomous AgentsEstablished evidence

    67% of intended weighted task evidence across 3 independent sources. 6 of 6 configured evaluation feeds currently have results.

  • Best LLM for Document SummarizationEstablished evidence

    65% of intended weighted task evidence across 3 independent sources. 5 of 6 configured evaluation feeds currently have results.

  • Best LLM for SummarizationEstablished evidence

    65% of intended weighted task evidence across 3 independent sources. 5 of 6 configured evaluation feeds currently have results.

  • Best LLM for CodingEstablished evidence

    64% of intended weighted task evidence across 4 independent sources. 7 of 7 configured evaluation feeds currently have results.

  • Best Open-Weight LLM for Self-HostingEstablished evidence

    64% of intended weighted task evidence across 2 independent sources. 2 of 3 configured evaluation feeds currently have results.

  • Best LLM for Grounded RAGEstablished evidence

    62% of intended weighted task evidence across 3 independent sources. 5 of 7 configured evaluation feeds currently have results.

  • Best LLM for Image UnderstandingEstablished evidence

    61% of intended weighted task evidence across 2 independent sources. 2 of 3 configured evaluation feeds currently have results.

  • Best LLM for Fast SummariesEstablished evidence

    58% of intended weighted task evidence across 2 independent sources. 2 of 3 configured evaluation feeds currently have results.

  • Best Value LLMEstablished evidence

    58% of intended weighted task evidence across 2 independent sources. 2 of 3 configured evaluation feeds currently have results.

  • Best LLM for AI AgentsEstablished evidence

    50% of intended weighted task evidence across 3 independent sources. 9 of 9 configured evaluation feeds currently have results.

  • Best LLM for Literary TranslationEstablished evidence

    50% of intended weighted task evidence across 2 independent sources. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for Everyday TranslationEstablished evidence

    50% of intended weighted task evidence across 2 independent sources. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for TranslationEstablished evidence

    50% of intended weighted task evidence across 2 independent sources. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for Hermes AgentEstablished evidence

    48% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for OpenHandsEstablished evidence

    48% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for GooseEstablished evidence

    48% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for OpenClawEstablished evidence

    48% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

  • Best Local LLM for CodingEstablished evidence

    47% of intended weighted task evidence across 2 independent sources. 4 of 4 configured evaluation feeds currently have results.

  • Best LLM for RAG & Long ContextEstablished evidence

    44% of intended weighted task evidence across 2 independent sources. 5 of 6 configured evaluation feeds currently have results.

  • Best Cheap LLM for High VolumeEstablished evidence

    40% of intended weighted task evidence across 2 independent sources. 2 of 3 configured evaluation feeds currently have results.

  • Cheapest Capable LLMEstablished evidence

    40% of intended weighted task evidence across 2 independent sources. 2 of 3 configured evaluation feeds currently have results.

  • Best LLM for JSON & Schema OutputEstablished evidence

    35% of intended weighted task evidence across 2 independent sources. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for Structured Data ExtractionEstablished evidence

    35% of intended weighted task evidence across 2 independent sources. 3 of 4 configured evaluation feeds currently have results.

  • Best LLM for Debugging & Code ReviewEstablished evidence

    33% of intended weighted task evidence across 2 independent sources. 5 of 5 configured evaluation feeds currently have results.

  • Best LLM for OCR & DocumentsProvisional evidence

    45% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Document or Structured-output eval. 3 of 5 configured evaluation feeds currently have results.

  • Best LLM for Charts & DiagramsProvisional evidence

    45% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Document or Structured-output eval. 3 of 5 configured evaluation feeds currently have results.

  • Best LLM for Vision & DocumentsProvisional evidence

    40% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Document or Structured-output eval. 4 of 6 configured evaluation feeds currently have results.

  • Best LLM for Tool & Function CallingProvisional evidence

    38% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or LMArena Search. 6 of 7 configured evaluation feeds currently have results. Official release evidence is also tracked provisionally.

  • Best LLM for Document ParsingProvisional evidence

    37% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Document or Structured-output eval. 3 of 5 configured evaluation feeds currently have results.

  • Best LLM for High-Volume ExtractionProvisional evidence

    21% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Route reliability or Structured-output eval. 1 of 3 configured evaluation feeds currently have results.

  • Best LLM for Massive ContextProvisional evidence

    20% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from LMArena Document or LongBench v2. 2 of 3 configured evaluation feeds currently have results.

  • Best LLM for Computer & Browser UseProvisional evidence

    17% of intended weighted task evidence across 1 independent source; broader independent confirmation is still missing from Berkeley Function Calling or OSWorld Verified. 3 of 3 configured evaluation feeds currently have results.

Official release evidence · provisional

What the launch material actually says

Verbatim claims from the model provider. These help on launch day but do not count as independent confirmation.

Recommendation coverage

Where this model appears

  1. #1Best LLM for Business Writing
  2. #1Best LLM for Marketing Copy
  3. #1Best LLM for Creative Writing
  4. #1Best LLM for Literary Translation
  5. #1Best LLM for Translation
  6. #1Best LLM for Vision & Documents
  7. #1Best LLM for Chat & Roleplay
  8. #1Best LLM for Fast Summaries
  9. #1Best LLM for Writing
  10. #1Best LLM for Roleplay & Character
  11. #1Best LLM for Charts & Diagrams
  12. #1Best LLM for Document Parsing
  13. #1Best LLM for Everyday Translation
  14. #1Best LLM for OCR & Documents
  15. #2Best Value LLM
  16. #2Best LLM for Document Summarization
  17. #2Best LLM for a General Assistant
  18. #2Best LLM for Summarization
  19. #2Best LLM for Logic & Problem Solving
  20. #4Best Cheap LLM for High Volume
  21. #4Best LLM for Massive Context
  22. #4Cheapest Capable LLM
  23. #5Best LLM for RAG & Long Context
  24. #6Best LLM for Image Understanding
  25. #7Best LLM for Grounded RAG
  26. #8Best LLM for Computer & Browser Use

Compare head to head

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