Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

GPT-5.6 Sol vs Nous: Hermes 4 405B benchmark

Name: GPT-5.6 Sol vs Nous: Hermes 4 405B AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares GPT-5.6 Sol (OpenAI) and Nous: Hermes 4 405B (nousresearch) using the latest snapshots we have as of Aug 17, 2026. Nous: Hermes 4 405B wins on output price at $3/1M. GPT-5.6 Sol has the larger context window (1.1M tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

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OpenAI

GPT-5.6 Sol

OpenAI 5.6 flagship tier. Official API $5/$30 per 1M tokens (OpenAI pricing, Jul 30 2026 update left Sol unchanged).

Elo 1,608$30/1M out

nousresearch

Nous: Hermes 4 405B

Auto-discovered from OpenRouter (nousresearch/hermes-4-405b). Preview until a second source matches.

$3/1M out

GPT-5.6 Sol Inference Compute Profile

Inference-Time Compute & Reasoning EffortDynamic CoT

GPT-5.6 Sol Reasoning Scaler & Token Billing Simulator

Param: reasoning_effort

Reasoning models scale test-time compute by generating hidden chain-of-thought (CoT) tokens. These tokens are billed at standard output rates and directly expand latency (TTFT) in exchange for higher GPQA Diamond and SWE-bench Verified problem resolve rates.

Estimated TTFT

270 ms

1.0x (Standard eval)

CoT Thinking Tokens

~1,500

Billed as output tokens

Est. Cost / 1k Calls

$56.50

4.9x base invoice

STEM / SWE Boost

+4.5%

GPQA & SWE-bench scaling

Medium (Standard) Operational Profile

Default evaluation baseline balancing reasoning depth with stream rate.

Direct Provider APIOpenAI

"reasoning_effort": "medium"

OpenRouter Unified APIUnified Gateway

"reasoning": {
  "effort": "medium",
  "max_tokens": 1500
}

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Instant pairwise benchmark recalculation across 400+ LLMs

Model A

Model B

Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

GPT-5.6 Sol (8)vsNous: Hermes 4 405B (2)

GPT-5.6 Sol: 8W (80%)Overall: GPT-5.6 SolNous: Hermes 4 405B: 2W (20%)

← GPT-5.6 SolNous: Hermes 4 405B →

GPT-5.6 Sol (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,608vs—

Coding Elo

1,602vs—

SWE-bench

77.6%vs—

LiveBench

73.9%vs—

GPQA Diamond

86.8%vs—

GPT-5.6 Sol: 5WNous: Hermes 4 405B: 0W

GPT-5.6 Sol (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

84 tok/svs—

Time to first token

270 msvs—

GPT-5.6 Sol: 2WNous: Hermes 4 405B: 0W

Nous: Hermes 4 405B (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$30/1Mvs$3/1M

Input price

$5/1Mvs$1/1M

Context window

1.1Mvs131k

GPT-5.6 Sol: 1WNous: Hermes 4 405B: 2W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageGPT-5.6 Sol 5/6

Preference Elo

No shared data

Throughput Speed

No shared data

Token Price Efficiency

Nous: Hermes 4 405B

$27.00/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,608

EloHigh is better

—

Code Elo

High is better

1,602

Code EloHigh is better

—

LiveBench

High is better

73.9%

LiveBenchHigh is better

—

SWE-bench

High is better

77.6%

SWE-benchHigh is better

—

GPQA

High is better

86.8%

GPQAHigh is better

—

TTFT

Low is better

270 ms

TTFTLow is better

—

Speed

High is better

84 tok/s

SpeedHigh is better

—

In $

Low is better

$5.00 / 1M

In $Low is better

$1.00 / 1M+400%

Out $

Low is better

$30.00 / 1M

Out $Low is better

$3.00 / 1M+900%

Context

High is better

+701%1.1M

ContextHigh is better

131k

Interactive Simulator (USD)

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save up to 87% with Nous: Hermes 4 405B

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

GPT-5.6 Sol$625.00 / mo

In: $175Out: $450

Nous: Hermes 4 405B$80.00 / mo

In: $35Out: $45

Estimated Cost Delta

Nous: Hermes 4 405B is estimated to save $545.00/month ($6,540/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Nous: Hermes 4 405B:Pick Nous: Hermes 4 405B when you are optimizing output cost.
2
GPT-5.6 Sol:Pick GPT-5.6 Sol for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatNous: Hermes 4 405B

Lower output list price ($3/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGGPT-5.6 Sol

Larger window (1.1M).

Screenshots / visionGPT-5.6 Sol

GPT-5.6 Sol is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	Nous: Hermes 4 405B	Lower output list price ($3/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	GPT-5.6 Sol	Larger window (1.1M).
Screenshots / vision	GPT-5.6 Sol	GPT-5.6 Sol is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news

compareAug 12, 2026

Grok vs ChatGPT: price and Elo, not a personality contest

Brand hub remaps to top xAI vs top OpenAI. After Aug 12 that is Grok 4.6 vs Sol.

compareJul 24, 2026

Claude vs GPT benchmark: this hub always remaps to the current Elo leaders

Not a frozen 2025 article. Today that is usually Opus 5 vs GPT-5.6 Sol. Dated cells, not a brand fight.

compareJul 16, 2026

Gemini vs GPT: long context versus the OpenAI flagship invoice

Hub remaps to top Google vs top OpenAI Elo. Usually 3.6 Pro vs Sol. Window vs price is the plot.

launchJul 9, 2026

GPT-5.6 Sol: OpenAI’s $5/$30 flagship tier on this leaderboard

Jul 9 2026 family; Jul 30 price update left Sol unchanged. This is the GPT side of Claude vs GPT.

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LIVE

OpenAI

GPT-5.6 Sol

Elo 1,608

LiveBench73.9%

SWE-bench77.6%

Speed84 tok/s

Output cost$30/1M

nousresearch

Nous: Hermes 4 405B

Elo n/a

LiveBench—

SWE-bench—

Speed—

Output cost$3/1M

Frequently Asked Questions

Which is better overall, GPT-5.6 Sol or Nous: Hermes 4 405B?: We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, GPT-5.6 Sol or Nous: Hermes 4 405B?: SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?: Nous: Hermes 4 405B output tokens are $3/1M versus $30/1M. Input prices and retry rates still move the real bill.
Which is faster, GPT-5.6 Sol or Nous: Hermes 4 405B?: We do not have TTFT for both models.
Which has the larger context window?: GPT-5.6 Sol accepts 1.1M tokens versus 131k.
Can I self-host either model?: Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. GPT-5.6 Sol and Nous: Hermes 4 405B Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All GPT-5.6 Sol matchups →|All Nous: Hermes 4 405B matchups →

GPT-5.6 Sol vs GPT-5 (previous gpt-flagship)GPT-5.6 Terra vs GPT-5.6 Sol GPT-4.5 Orion vs GPT-5.6 Sol OpenAI: o3 Mini vs GPT-5.6 Sol Claude Fable 5 vs GPT-5.6 Sol Claude Opus 4.8 vs GPT-5.6 Sol

GPT-5.6 Sol vs Nous: Hermes 4 405B benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

GPT-5.6 Sol (8)vsNous: Hermes 4 405B (2)

GPT-5.6 Sol: 8W (80%)Overall: GPT-5.6 SolNous: Hermes 4 405B: 2W (20%)

← GPT-5.6 SolNous: Hermes 4 405B →

GPT-5.6 Sol (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,608vs—

Coding Elo

1,602vs—

SWE-bench

77.6%vs—

LiveBench

73.9%vs—

GPQA Diamond

86.8%vs—

GPT-5.6 Sol: 5WNous: Hermes 4 405B: 0W

GPT-5.6 Sol (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

84 tok/svs—

Time to first token

270 msvs—

GPT-5.6 Sol: 2WNous: Hermes 4 405B: 0W

Nous: Hermes 4 405B (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$30/1Mvs$3/1M

Input price

$5/1Mvs$1/1M

Context window

1.1Mvs131k

GPT-5.6 Sol: 1WNous: Hermes 4 405B: 2W

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatNous: Hermes 4 405B

Lower output list price ($3/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGGPT-5.6 Sol

Larger window (1.1M).

Screenshots / visionGPT-5.6 Sol

GPT-5.6 Sol is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	Nous: Hermes 4 405B	Lower output list price ($3/1M).
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	GPT-5.6 Sol	Larger window (1.1M).
Screenshots / vision	GPT-5.6 Sol	GPT-5.6 Sol is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, GPT-5.6 Sol or Nous: Hermes 4 405B?

We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.

Which is better at coding, GPT-5.6 Sol or Nous: Hermes 4 405B?

SWE-bench is missing for at least one model, so we do not rank coding from a single number.

Which is cheaper to run in production?

Nous: Hermes 4 405B output tokens are $3/1M versus $30/1M. Input prices and retry rates still move the real bill.

Which is faster, GPT-5.6 Sol or Nous: Hermes 4 405B?

We do not have TTFT for both models.

Which has the larger context window?

GPT-5.6 Sol accepts 1.1M tokens versus 131k.

Can I self-host either model?

Neither model is marked open-weights here. You are comparing hosted APIs.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. GPT-5.6 Sol and Nous: Hermes 4 405B Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

GPT-5.6 Sol Reasoning Scaler & Token Billing Simulator

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

Nous: Hermes 4 405B

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Grok vs ChatGPT: price and Elo, not a personality contest

Claude vs GPT benchmark: this hub always remaps to the current Elo leaders

Gemini vs GPT: long context versus the OpenAI flagship invoice

GPT-5.6 Sol: OpenAI’s $5/$30 flagship tier on this leaderboard

Cast Your Matchup Vote

Community Discussions (0)

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CompareLLM Matrix

GPT-5.6 Sol

Nous: Hermes 4 405B

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

GPT-5.6 Sol Reasoning Scaler & Token Billing Simulator

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

No shared data

No shared data

Nous: Hermes 4 405B

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Grok vs ChatGPT: price and Elo, not a personality contest

Claude vs GPT benchmark: this hub always remaps to the current Elo leaders

Gemini vs GPT: long context versus the OpenAI flagship invoice

GPT-5.6 Sol: OpenAI’s $5/$30 flagship tier on this leaderboard

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

GPT-5.6 Sol

Nous: Hermes 4 405B

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons