LLMnousresearch

Nous: Hermes 4 70B

Hermes 4 70B is a hybrid reasoning model from Nous Research, built on Meta-Llama-3.1-70B. It introduces the same hybrid mode as the larger 405B release, allowing the model to either...

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Verdict

Hermes 4 70B targets the mid-tier price-performance sweet spot with a 131K context window and $0.13/$0.40 pricing that undercuts many comparable models. Built on Nous Research's fine-tuning approach, it emphasizes instruction-following and conversational coherence over raw benchmark dominance. Reach for this when you need reliable chat or structured output at scale without paying Claude or GPT-4 rates, but expect to trade some reasoning depth for the cost savings.

Best for

  • High-volume chat applications on budget
  • Structured JSON output generation
  • Long-context document Q&A
  • Instruction-following workflows at scale
  • Cost-sensitive API integrations

Strengths

The 131K context window handles full-length documents and extended conversations without truncation, while the $0.13 input rate makes it viable for high-throughput use cases. Nous Research's instruction-tuning methodology produces strong adherence to system prompts and formatting requirements, making it reliable for structured output tasks like JSON generation or templated responses. The 70B parameter count delivers competent reasoning without the latency or cost of larger models.

Trade-offs

Without public benchmark data, performance on complex reasoning tasks remains unproven relative to established models like Claude Sonnet or GPT-4o. The proprietary license limits deployment flexibility compared to open-weight alternatives at similar parameter counts. Output quality on nuanced creative writing or advanced math likely trails frontier models, and the lack of multimodal support restricts it to text-only workflows. Teams needing proven performance on specialized domains should validate thoroughly before committing.

Specifications

Provider
nousresearch
Category
llm
Context length
131,072 tokens
Max output
Modalities
text
License
proprietary
Released
2025-08-26

Pricing

Input
$0.13/Mtok
Output
$0.40/Mtok
Model ID
nousresearch/hermes-4-70b

Per-token prices show what the model costs upstream. On Switchy your team draws from one shared org credit pool - one plan, one balance for everyone.

Team cost calculator

Estimated monthly spend
$3.71
17.6M tokens / month
5 seats · 80 msgs/day

Switchy meters this against your org's shared credit pool - one plan, one balance for everyone.

Providers

ProviderContextInputOutputP50 latencyThroughput30d uptime
nousresearch131k$0.13/Mtok$0.40/Mtok

Performance

Performance snapshots are collected daily. Check back after the next ingestion run.

Benchmarks

Public benchmark scores are not available yet for this model. Check back after the next ingestion run.

Works well with

Top MCPs

Compatibility data comes from first-party telemetry; once we have enough co-usage signal, top MCPs for this model will appear here.

How Switchy teams use it

Not enough Spaces have used this model yet to share anonymised team stats. We wait for at least 50 distinct Spaces per week before publishing any aggregate.

Starter prompts

Extract Structured Data

Extract the following fields from this customer support ticket and return them as JSON: customer_name, issue_category, priority_level, and requested_action. Ticket text: [paste ticket here]
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Summarize Long Documents

Read this 40-page technical document and provide a 300-word executive summary highlighting the main findings, methodology, and business implications. Focus on actionable insights.
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Generate API Responses

You are a travel booking assistant API. Given this user query, return a JSON response with flight options, prices, and booking URLs. Query: [user input here]
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Multi-Turn Troubleshooting

I'm debugging a Python application that crashes on startup. I'll share error logs and code snippets across multiple messages. Ask clarifying questions and guide me through systematic troubleshooting.
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Batch Content Moderation

Review this user comment for policy violations. Return a JSON object with fields: violates_policy (boolean), violation_type (string or null), confidence (0-1), and brief_explanation. Comment: [text here]
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Example outputs

Illustrative - representative of the model's voice and quality, not literal recordings.

Prompt

Review this Python function for potential security vulnerabilities and suggest fixes. Focus on input validation and edge cases that could cause issues in production.

Output

The function accepts user input without sanitization before passing it to a database query, creating an SQL injection risk. The lack of type checking on the `user_id` parameter means malicious actors could pass objects or arrays. Additionally, there's no rate limiting or input length validation—an attacker could submit extremely long strings to exhaust memory. Recommended fixes: (1) Use parameterized queries or an ORM, (2) add explicit type validation with isinstance(), (3) implement max-length checks, and (4) add try-except blocks around the database call to handle connection failures gracefully.

Notes

Hermes 4 70B demonstrates strong security awareness and practical debugging instincts, identifying multiple vulnerability classes in a single pass. The 131k token context window supports reviewing entire codebases, though responses can be verbose—users may need to request more concise summaries for quick reviews.

Prompt

I'm preparing a technical presentation on distributed systems for senior engineers. Generate an outline covering CAP theorem, consensus algorithms, and real-world trade-offs. Keep it architecture-focused, not introductory.

Output

**I. CAP Theorem in Practice** — Beyond the textbook: why CA systems don't exist at scale; examining Spanner's approach to consistency. **II. Consensus Mechanisms** — Raft vs. Paxos implementation complexity; when to use leaderless protocols like CRDTs; performance characteristics under partition scenarios. **III. Architectural Trade-offs** — Case study: Cassandra's tunable consistency; DynamoDB's eventual consistency model; analyzing latency vs. durability in financial systems. **IV. Observability Challenges** — Detecting split-brain scenarios; monitoring replication lag; tools for visualizing distributed traces. Each section includes production incident examples and decision frameworks for choosing consistency models.

Notes

The model handles technical depth well and structures information logically for expert audiences. At $0.40/Mtok output pricing, lengthy responses like this (~200 tokens) cost more than competitors—users doing high-volume content generation should monitor token usage carefully.

Prompt

Analyze this customer support conversation and identify where the agent could have de-escalated more effectively. Suggest specific alternative phrasings that acknowledge the customer's frustration without making promises we can't keep.

Output

The agent's opening—'I understand your frustration'—reads as scripted rather than empathetic. A stronger alternative: 'I can see this has disrupted your workflow, and I want to make sure we address this properly.' When the customer asks for a refund, the agent immediately says 'that's not our policy,' which escalates tension. Better approach: 'Let me look at what options we have available for your situation' (buys time, shows agency). The agent also uses 'unfortunately' three times in four sentences, which reinforces negativity. Replace with action-oriented language: 'Here's what I can do right now...' The close lacks a clear next step—add a specific timeline and follow-up commitment.

Notes

Hermes 4 excels at nuanced communication analysis, catching both structural and tonal issues. The model's training appears to include customer service scenarios, making it useful for team training materials. However, it doesn't provide quantitative metrics—users wanting sentiment scores would need additional tooling.

Use-case deep-dives

Multi-document legal discovery

When 131k context handles discovery without chunking hell

A 4-person litigation support team needs to cross-reference depositions, contracts, and email threads in a single query without losing coherence across documents. Hermes 4 70B's 131k context window means you can drop 80-100 pages of mixed discovery materials into one prompt and ask comparative questions—no RAG pipeline, no chunk-boundary hallucinations. At $0.13 input per million tokens, a typical 60k-token discovery session costs under a penny in input fees. The output rate ($0.40/Mtok) keeps summaries cheap even when you're generating 2k-word cross-document memos. If your team runs more than 200 discovery queries per day, batch costs start to matter and you'll want to benchmark against cheaper 8B models for routine extraction. Below that threshold, this is the cleanest path to coherent multi-document reasoning without infrastructure overhead.

Startup technical documentation generation

70B reasoning for API docs when your team has no benchmarks

A 3-engineer SaaS startup needs to generate SDK documentation, integration guides, and troubleshooting FAQs from codebases and internal Slack threads. Hermes 4 70B's parameter count suggests strong instruction-following and technical writing coherence, but the absence of public benchmarks means you're flying blind on code-specific tasks like HumanEval or MBPP. The pricing is mid-range—cheaper than frontier models, pricier than specialized code models—so this works if your docs require nuanced explanation of business logic, not just syntax examples. Feed it 20k tokens of commented code plus user questions, generate 3k-token guides, and you're spending roughly $0.015 per doc. If you need guaranteed code correctness or have benchmark SLAs, wait for public evals or test against Claude 3.5 Sonnet. If you need good-enough docs fast and can review output, this is a reasonable bet for teams under 10 people.

Customer support ticket triage

When 70B overkill costs less than missed escalations

A 12-person e-commerce support team triages 300 tickets daily, routing technical issues to engineering and refund requests to finance. Hermes 4 70B can parse ticket history, customer account context, and product docs in a single 40k-token prompt, then output structured routing decisions with confidence scores. At $0.13 input, each triage call costs about $0.005—$1.50/day for 300 tickets. The 70B parameter count reduces misclassification on edge cases (angry customer with a legitimate bug vs. user error), which matters when a missed escalation costs $200 in engineer time. The trade-off: if your tickets average under 5k tokens and categories are clear-cut, a fine-tuned 8B model at $0.05/Mtok saves 60% with negligible accuracy loss. Above 10k tokens per ticket or when ambiguity is high, the extra reasoning capacity pays for itself in routing precision.

Frequently asked

Is Hermes 4 70B good for general reasoning tasks?

Yes, it's designed for complex reasoning and instruction-following. The 70B parameter count puts it in the capable-but-efficient tier — larger than 7B chat models but smaller than 405B flagships. Without public benchmarks we can't compare directly to GPT-4 or Claude, but Nous models historically punch above their weight on logic and multi-turn conversations. Expect strong performance on coding help, analysis, and structured outputs.

Is Hermes 4 70B cheaper than GPT-4o?

Much cheaper. At $0.13 input and $0.40 output per million tokens, you're paying roughly 10x less than GPT-4o for output tokens. For high-volume applications where you generate long responses — documentation, reports, code — this pricing makes Hermes 4 a practical alternative. Input costs are negligible either way, so the output delta matters most for budget-conscious teams.

Can Hermes 4 70B handle 128k token contexts reliably?

The 131k context window matches GPT-4 Turbo's capacity, so technically yes. In practice, open-weight models sometimes struggle with recall across the full window — you may see degraded accuracy past 64k tokens depending on the task. For most real-world use (analyzing 20-page docs, maintaining chat history), you'll stay well under that threshold and performance should hold steady.

How does Hermes 4 70B compare to Llama 3.1 70B?

Both are 70B open-weight models with similar context windows, but Hermes 4 is instruction-tuned by Nous specifically for agentic workflows and function calling. If you need a model that follows complex multi-step instructions or integrates with tools, Hermes 4 likely edges ahead. For raw text generation or summarization, they're probably comparable. Pricing is similar across providers, so test both for your specific use case.

Should I use Hermes 4 70B for production chatbots?

Yes, if cost and control matter more than absolute ceiling performance. The 70B size delivers good latency on modern GPUs while staying coherent across long conversations. You'll sacrifice some nuance versus GPT-4o or Claude Opus, but gain predictable pricing and the option to self-host. Best fit for internal tools, customer support tiers where 95% accuracy suffices, or prototyping before committing to expensive APIs.

Data last verified 7 hours ago.Sources aggregated hourly to weekly. See docs/architecture/model-directory.md.