Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Gemini 3 Flash Preview (Reasoning) | Hermes 4 - Llama-3.1 405B (Reasoning) |
|---|---|---|
| Input ($/M tokens) | $0.5 | $1 |
| Output ($/M tokens) | $3 | $3 |
Verdict. Gemini 3 Flash Preview (Reasoning) wins the overall benchmark matchup 1–0 across 1 overlapping categories, but raw benchmark score is only one input to the decision.
Pricing. Both models sit in the budget bracket for output-token pricing. At 1.0× the per-million-token cost, Hermes 4 - Llama-3.1 405B (Reasoning) is meaningfully cheaper if your traffic is output-heavy (long completions, document generation, agent loops). Hermes 4 - Llama-3.1 405B (Reasoning) makes more sense when output volume is low and absolute reasoning quality justifies the premium.
Strengths. Gemini 3 Flash Preview (Reasoning) is strongest on Intelligence Index (38.7). Hermes 4 - Llama-3.1 405B (Reasoning) leads on Intelligence Index (8.8).
Speed. On throughput, Gemini 3 Flash Preview (Reasoning) generates tokens at 189 tok/s versus 31 tok/s — about 84% faster. On time-to-first-token, Hermes 4 - Llama-3.1 405B (Reasoning) responds in 2730ms vs 6570ms, which matters most for chat-style UIs.
Provider. Google and Nous Research sell to overlapping but distinct developer audiences: Google tends to ship frontier reasoning models with premium positioning, while Nous Research often prices more aggressively. Your existing vendor relationships, billing, and SLA preferences may matter as much as the raw numbers above.
Workload cost. Workload scenarios (per million requests at 30M input + 15M output tokens): Gemini 3 Flash Preview (Reasoning) costs $60.00 ($720/year); Hermes 4 - Llama-3.1 405B (Reasoning) costs $75.00 ($900/year). At a smaller 5M-input/2M-output scale (single-developer tool or prototype): Gemini 3 Flash Preview (Reasoning) ≈ $8.50/run, Hermes 4 - Llama-3.1 405B (Reasoning) ≈ $11.00/run. At agent/realtime scale (200M input / 100M output per million requests): Gemini 3 Flash Preview (Reasoning) ≈ $400/run, Hermes 4 - Llama-3.1 405B (Reasoning) ≈ $500/run. Gemini 3 Flash Preview (Reasoning) becomes more attractive at higher volume — the absolute per-token pricing difference compounds when you ship at scale.
Recommendation. Both models have legitimate use cases — the right answer depends on whether you are optimizing for benchmark ceiling, latency, or unit cost. Start with the cheaper / faster model, evaluate against your specific task, and only switch if the upgrade shows a meaningful lift.
Head-to-head deltas
Data from Artificial Analysis API — 12 benchmarks
Gemini 3 Flash Preview (Reasoning) is cheaper overall. Its blended price (3:1 input/output ratio) is $1.13/M tokens vs $1.50/M for Hermes 4 - Llama-3.1 405B (Reasoning).
Gemini 3 Flash Preview (Reasoning) wins 1 out of 12 benchmarks compared to 0 for Hermes 4 - Llama-3.1 405B (Reasoning). See the detailed benchmark chart above for per-category results.
Gemini 3 Flash Preview (Reasoning) generates tokens faster at 189 tok/s vs 31 tok/s. However, Hermes 4 - Llama-3.1 405B (Reasoning) has lower time-to-first-token (2.73s vs 6.57s).
Choose based on your priorities: Gemini 3 Flash Preview (Reasoning) for lower cost, Gemini 3 Flash Preview (Reasoning) for stronger benchmark performance, and Gemini 3 Flash Preview (Reasoning) for faster generation. For latency-sensitive apps, check the TTFT comparison above.