HERMES API MODEL GUIDE

Gemini 3.8 Flash for Hermes

Use Gemini 3.8 Flash when an Agent needs to understand mixed sources, including text, screenshots, video, audio, and PDFs. Give it a clear finish line, because a fast model can still spend too much when a task has no limits.

Use Gemini in Hermes →Get an API key →

At a glance

Strong input handling needs strong task limits.

Gemini 3.8 Flash is useful when a workflow has more than text. It can read a supplier PDF, inspect product screens, extract evidence from a video, and return a structured result for the next Hermes step.

It is not a reason to make an Agent fully autonomous. The useful pattern is simple: define the allowed inputs, choose an answer format, limit tool calls, and require a person to approve important output.

Model ID: google/gemini-3.8-flash
Context window: 1,048,576 tokens
Input: $0.675 / 1M tokens
Output: $3.375 / 1M tokens
Cache read: $0.0675 / 1M tokens
API features: Tools, vision, audio, JSON, streaming

01 / Task fit

Use it when the Agent must understand the source, not just sort text.

The best Gemini 3.8 Flash tasks have a known input set and a checkable answer. The model can do the first pass across different file types. A person still owns the final decision.

Research briefs

Turn pages, PDFs, screenshots, and notes into a short brief with evidence and open questions.

Visual review

Read a product screen or dashboard and list missing states, unclear labels, and risks to check.

Small code work

Make a narrow code change with a file limit, a test command, and a final report.

Structured handoff

Return fixed fields for the next Agent instead of an open ended explanation.

Task routing

Put Gemini between the source and the decision.

Hermes should use Gemini 3.8 Flash for evidence gathering and bounded execution. Route high risk choices to a person or a separate review step.

TaskWhy Gemini fitsRoute elsewhere when

Read a mixed research packIt can handle text, images, video, audio, and PDF inputs in one task.The final recommendation changes a customer promise, legal position, or investment decision.

Review a screen before buildIt can describe visible UI details and compare them with a checklist.The task requires a final design approval or a production release.

Call an approved toolThe tool has a narrow purpose and checked parameters.The action publishes, spends money, deletes data, or sends an external message.

Make a small code changeThe file scope, test command, and finish condition are defined.The change affects security, payments, migration, or a large codebase.

1. Set the boundaryName the sources, allowed tools, and answer format.

↓

2. Gemini does the first passRead, compare, extract, or prepare code.

↓

3. Check evidenceOpen important sources and verify tool results.

↓

4. Approve the next actionOnly approved output moves through Hermes.

A controlled Hermes task

Understand the source first. Let a person decide what happens next.

Source material

PDF
Screenshots
Video / audio
Task note

→

Gemini first pass

Read
Compare
Extract

→

Checkable result

Evidence
Unknowns
Next steps

→

A person decides the next step

Approve
Send back
Route onward

This is a recommended working pattern, not a promise of autonomous decisions.

02 / Cost control

Fast output can still become expensive.

≈ $0.03

For a task that reads 20,000 input tokens and returns 3,000 output tokens, the raw Gemini 3.8 Flash model cost on Hermes is about $0.024. Plan for about $0.03 before search, crawling, storage, and other tools.

INPUT $0.675 / 1M TOKENS · OUTPUT $3.375 / 1M TOKENS · CACHE READ $0.0675 / 1M TOKENS

Cost scenarios

Plan for the output you allow, not only the price you see.

Small review

≈ $0.0320k input + 3k output. A PDF, a few screenshots, and a short evidence list.

Longer brief

≈ $0.0520k input + 10k output. The same source pack, but with a much longer response.

Repeated work

Measure firstUse a short pilot before processing hundreds of records or allowing tool retries.

Gemini 3.8 Flash can produce more tokens than a simple task needs. Control the budget with a fixed schema, a response length limit, a maximum tool call count, and a rule to stop when evidence is missing.

03 / First task

Start with a result a person can check in two minutes.

Do not give an Agent a whole project first. Give it a small set of files, fixed fields, and a clear stop rule. This tells you whether the model is useful before you scale usage.

A person should check: every important claim has evidence; unknown facts stay unknown; the answer is within scope; no outside action happened without approval.

{
  "product_name": "...",
  "claimed_material": "...",
  "missing_specifications": [],
  "evidence": [{"field": "...", "source": "..."}],
  "questions_for_review": []
}

Three starter tasks

Give the model work with a clear finish line.

01 · Evidence

Prepare a supplier brief

Read a PDF, product photos, and a note. Return only claimed facts, missing data, evidence, and questions for the supplier.

02 · Screen review

Find UI gaps before development

Compare a screenshot with a short requirement list. Flag missing states and unclear actions. Do not ask the model to approve the release.

03 · Code task

Make one checkable change

Limit the files, state the expected behavior, require tests, and ask the model to report what actually ran.

Model choice

Gemini 3.8 Flash or DeepSeek V4.1 Flash?

Choose Gemini 3.8 Flash

When the source includes screenshots, PDFs, video, or audio; when the task needs structured output and an approved tool; or when one Agent must understand several input types together.

Choose DeepSeek V4.1 Flash

When the work is mostly text, repeats across many records, has a fixed format, and needs a lower cost first pass.

A practical Hermes workflow can use DeepSeek V4.1 Flash to prepare repeat text work and Gemini 3.8 Flash to inspect mixed sources or visual evidence. Neither should approve a high risk action by itself.

Compare with DeepSeek V4.1 Flash →

Evidence and limits

Read benchmarks as signals, then test your own workflow.

Vendor information

Broad inputs and tool support

Google positions Gemini 3.8 Flash as a fast model for software work and complex workflows. Hermes exposes its tools, vision, audio, reasoning, streaming, and structured output features.

Independent signal

Strong capability for its price tier

Artificial Analysis places it above many models in its price range for overall capability and output speed. A benchmark result is not proof that it will finish your project without review.

Community reports

Long tasks need guardrails

Users report that bounded coding and research tasks can work well, while longer tasks may retry tools, create incorrect files, or spend more tokens than expected.

Sources: Google Gemini model documentation, Artificial Analysis, and public developer discussions. Vendor results, independent measurements, and community reports are shown as different types of evidence.

API setup

Call Gemini from the Hermes endpoint.

Create an API key, use the Hermes OpenAI compatible endpoint, set the model ID, and begin with a narrow prompt. Measure real token use before you add more inputs, tools, or volume.

Create an API key →Open the model →

curl https://api.hermes-ai.net/api/v1/chat/completions \\
  -H "Authorization: Bearer $HERMES_API_KEY" \\
  -H "Content-Type: application/json" \\
  -d '{
    "model": "google/gemini-3.8-flash",
    "messages": [{"role":"user","content":"Read the files. Return JSON with evidence, unknowns, and next steps."}],
    "response_format": {"type":"json_object"}
  }'

FAQ

Questions before you start

Is Gemini 3.8 Flash good for coding?

It is useful for small coding tasks with a defined file scope, tests, and a final report. Add a review step for security work, large code changes, or work that is hard to test.

Can it read screenshots and PDFs?

Yes. Hermes lists vision and audio support alongside text. It is a good fit when a task includes screenshots, PDFs, video, audio, and text.

How do I control Gemini 3.8 Flash cost?

Set a fixed answer schema, response length limit, tool call limit, and stop rule. Run a small pilot and measure actual token use before scaling.

What should a person check?

Check source evidence, changed files, test results, scope, and any external action. Require approval before a workflow sends messages, publishes content, changes data, or spends money.

HERMES API

Start with one controlled Gemini task.

Create a Hermes API key, select google/gemini-3.8-flash, and begin with a small task that a person can verify.

Use Gemini in Hermes →Create an API key →