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Head-to-head comparison

Nex N2.5 Max vs GPT-5.6 Sol

Nex N2.5 Max (Nex AGI) and GPT-5.6 Sol (OpenAI) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 9 September 2026

As of 9 September 2026, GPT-5.6 Sol holds the stronger ModelCap Index position (#5 vs #13); and Nex N2.5 Max ships open weights.

Which should you choose?

Choose Nex N2.5 Max if…

  • you want to self-host: Nex N2.5 Max ships open weights while GPT-5.6 Sol is api only.
  • you want the more recently listed model — Nex N2.5 Max was listed 7 September 2026, GPT-5.6 Sol 9 July 2026.

Choose GPT-5.6 Sol if…

  • you want the stronger overall ModelCap Index position — #5 against #13 (83.0 vs 77.8 points).
  • you want provider choice — 3 listed API providers against 0.

Nex N2.5 Max vs GPT-5.6 Sol: specs, pricing and context

Specification comparison of Nex N2.5 Max and GPT-5.6 Sol
FieldNex N2.5 MaxNex AGIGPT-5.6 SolOpenAI
ModelCap Index position#13#5
Index score77.883.0
EvidenceEstimatedMeasured
Input price / 1M tokensUnlisted$2.00
Output price / 1M tokensUnlisted$10.00
Context window— tokens1M tokens
Max output tokens—128K
API providers listed03
Weight accessOpen weightsAPI only
Input modalitiesTextFile, Image, Text
First listed7 September 20269 July 2026
PublisherNex AGIOpenAI

Evidence: global-corpus-prior over 182 held-out anchors (7%); launch card against 5 resolved peers on 5 rows (93%); optimism haircut 0 from cross-lab-probe; shrunk 1.8 toward the measured corpus · 7 public benchmark observations across 7 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Nex N2.5 Max vs GPT-5.6 Sol

Public benchmark boards where Nex N2.5 Max or GPT-5.6 Sol has a published result
BoardNex N2.5 MaxGPT-5.6 SolLeads
Arena codingArena (LMArena)—15291521–1537X-HighOnly one result
LMArena AgentLMArena—7.7%6.3%–9.2%X-HighOnly one result
ARC-AGI-2ARC Prize Foundation—92.5%MaxOnly one result
ARC-AGI-3ARC Prize Foundation—7.8%MaxOnly one result
AA Intelligence IndexArtificial Analysis—47.1intelligence-index:v4.3:maxOnly one result
AA Terminal-Bench 2.1Artificial Analysis—88.0%terminal-bench:2.1:terminus-2:e2b:pass-at-1:3-repeats:source-model="GPT-5.6 Sol (max)":reasoning=trueOnly one result
AA τ²-Bench TelecomArtificial Analysis—85.1%tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="GPT-5.6 Sol (max)":reasoning=trueOnly one result
AA Humanity's Last ExamArtificial Analysis—49.5%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="GPT-5.6 Sol (max)":reasoning=trueOnly one result
Terminal-Bench 4.0Terminal-Bench (Laude Institute)—37.3%33.5%–41.1%Codex · MaxOnly one result
WildClawBench OpenClawWildClawBench—67.2Only one result

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Nex N2.5 Max vs GPT-5.6 Sol: common questions

Is Nex N2.5 Max better than GPT-5.6 Sol?

GPT-5.6 Sol ranks higher on the ModelCap Index as of 9 September 2026: #5 against #13. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.

Is Nex N2.5 Max cheaper than GPT-5.6 Sol?

At least one of the two has no listed API price on ModelCap right now, so no price comparison is made.

Which has the bigger context window, Nex N2.5 Max or GPT-5.6 Sol?

Both publish a —-token context window.

Which is better for coding, Nex N2.5 Max or GPT-5.6 Sol?

The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.

Are Nex N2.5 Max and GPT-5.6 Sol open-weight models?

Nex N2.5 Max: Open weights. GPT-5.6 Sol: API only. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Nex N2.5 Max and GPT-5.6 Sol?

ModelCap currently lists 0 API providers for Nex N2.5 Max and 3 for GPT-5.6 Sol, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Nex N2.5 Max vs GPT-5.6 Sol comparison?

Every figure comes from the sealed ModelCap dataset published 9 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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