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Tier A — Frontier
Runs in:USMade in:United States
Google Gemini

Gemini 3.8 Flash

Tier A — Frontier · 1.048576M tokens

Tokonomix Editorial Team·Reviewed by Mes Kalkan··
Section 01

Speed analysis

Latency measured across all benchmark runs. P50 (median) and P95 (95th percentile) give a realistic picture of response speed under normal and peak load.

P50 latency (median)P95 latency55 runs
507198534634940641809-3010-13ms
Section 02

Quality scores

How this model compares to the rest of the field on each prompt category, from a pairwise fit over the same prompts. The raw judge score sits underneath each number.

51%
Coding
judge mean 64
42%
Factual
judge mean 60
4%
Reasoning
judge mean 39

Win rate per category: how often this model beats a field-average model on a prompt from that category. 50% is average, not a failing grade. It is not a percentage of correct answers.

Section 03

Pricing

What you pay per million tokens when you use this model on Tokonomix, plus an estimate for a typical conversation.

💰
API rates — Gemini 3.8 Flash
$1.13 per 1M input tokens
$5.61 per 1M output tokens
≈ $0.0018 per typical conversation (800 tokens)
Input vs output price (per 1M tokens)
per 1M input tokens$1.13
per 1M output tokens$5.61
Section 04

Tokens per second

Throughput in tokens per second, derived from measured P50 latency. Higher is better; fluctuations track provider-side load.

Throughput (tokens / s)156 / avg 173
39153

Estimated from P50 latency × 200 output tokens — the absolute number depends on this assumption; the trend is what matters.

Section 05

Capabilities

toolssource: seed-newest-generation-2026-09-30visionjson modepdf inputreasoningaudio inputjson schemaparallel toolsprompt cachingoutputTokenLimit: 65536max output tokens: 65535
Section 06

Availability

Availability

How often this model answers when we call it — measured across real API requests and live tests over the last 30 days. This is separate from quality: these numbers only tell you whether the model responds, not how good the answer is.

Last 7 days

85.7%

n=14

Last 30 days

87.5%

n=16

Median response time

12,735ms

n=14

Based on 189 measurements over the last 30 days.

Technical details

Only live API calls and live-test requests count — internal probes and benchmark runs are excluded.

Calls with a custom API key (BYOK) are excluded: those failures are key-specific, not a sign of model downtime.

Failed calls are NOT included in quality scores — quality is measured on successful responses only. Availability and quality are independent signals.

Median response time (p50) across successful calls with a recorded duration. Outliers (very slow or very fast calls) pull the median less than the average.

Total calls (30d)

16

OK responses (30d)

14

Total calls (7d)

14

OK responses (7d)

12

Section 07

Tokonomix benchmark verdicts

⚖️
Endorsed by 1 judge
Independent LLM judges evaluated this model on our weekly intelligence tests
claude-sonnet-4-559/100 · 8 runs
4 correct0 partial4 wrong50% accuracy
● 2026-10-11

Gemini 3.8 Flash adds multimodal tools and structured output capabilities

Gemini 3.8 Flash has gained significant functional expansion with the addition of multiple capabilities previously unavailable. The model now supports tools and parallel tool calling, enabling function-based interactions. Vision, PDF input, and audio input capabilities have been added, making this a fully multimodal offering. Structured output is now available through both JSON mode and JSON schema enforcement, addressing developer needs for reliable formatting. Reasoning capabilities and prompt caching have also been introduced, though performance metrics for these features are not yet available. The model maintains its flash designation, suggesting continued emphasis on speed and efficiency. This represents a substantial evolution from a text-only model to a comprehensive multimodal platform. Users gain access to document understanding, image processing, and audio analysis within a single model. The parallel tools feature allows for more efficient multi-step operations. These additions position Gemini 3.8 Flash as a versatile option for applications requiring diverse input modalities and structured interactions. Developers should evaluate the quality of these newly added capabilities in their specific use cases.

Quality

—

Latency p50

—

Test runs

0

✓ Multimodal input support added✓ Tool calling now available✓ JSON schema enforcement enabled✓ Prompt caching introduced
Last automated test
Oct 13, 2026 · 20:00 UTC · Speed benchmark
P50 latency
1284 ms
P95 latency
1760 ms
Errors
0 / 6 runs
Last reviewed by Tokonomix Team·October 13, 2026