Gemini 3.5 Flash

Mid-tier

Gemini 3.5 Flash went generally available on May 19, 2026 at Google I/O. At $1.50 per million input tokens and $9.00 per million output, with a 1,048,576 token input window and 65,536 output tokens, it is the first Flash-tier release that beats the previous Pro flagship (Gemini 3.1 Pro) on agentic coding suites (Terminal-Bench 2.1 at 76.2%, MCP Atlas at 83.6%, CharXiv Reasoning at 84.2%) while running roughly 4x faster at around 289 output tokens per second. Google positions it as the new daily-driver for coding agents and tool-use workflows where throughput and price-per-task matter.

Input Price

$1.50

per 1M tokens

Output Price

$9.00

per 1M tokens

Context Window

1.0M

tokens

Released

2026-05

API access

Capabilities

textvisiontool-usecodereasoning

Key Strengths

✓Beats Gemini 3.1 Pro on agentic coding
✓1M token input context
✓Roughly 4x faster than prior frontier tier
✓Reasoning, vision, and tool use included

Best For

▸Agentic coding and SWE-style tool use
▸High-throughput RAG over long contexts
▸Live customer-facing assistants
▸Computer-use and MCP-driven agents

Benchmark Scores

Benchmark	Score	Description
SWE-bench	78.8	Real-world software engineering tasks from GitHub issues (SWE-bench Verified)
MMLU-Pro	89.5	General knowledge and reasoning across 57 subjects
GPQA Diamond	92.7	Graduate-level science questions verified by domain experts

Scores sourced from public benchmark datasets. See full benchmark leaderboard for all models.

Pricing Details

Input tokens

$1.50

per 1M tokens

Output tokens

$9.00

per 1M tokens

Estimated cost per 1K requests

$6.00

Mid-tier

OpenAI

$2.00 in / $10.00 out

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