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Decision support

DeepSeek V4.1 Flash 1017 vs Nex-N2.5-Pro

Compare canonical objects directly. The useful dimensions change with the object type, so model and hardware comparisons stay separate.

ModelsHardware
DeepSeek V4.1 Flash 1017

DeepSeek

Sources:models.devOpenRouter

Nex-N2.5-Pro

Nex AGI

Sources:OpenRouter

Benchmark results

  • Arena WebDev

    Arena rating · Higher is better

    • DeepSeek V4.1 Flash 1017
      1664
      Arena #17CI 1657 to 1670
    • Nex-N2.5-Pro
      Not reported
    Runs and sources
    DeepSeek V4.1 Flash 1017
    • max166495% CI 1657 to 1670 · 13,952 votes
    Nex-N2.5-Pro

    Not reported

    Source:Arena WebDev leaderboard, 2026-11-10

  • Agent Arena

    IPS score · Higher is better

    • DeepSeek V4.1 Flash 1017
      +0.020
      Arena #22CI +0.015 to +0.025
    • Nex-N2.5-Pro
      Not reported
    Runs and sources
    DeepSeek V4.1 Flash 1017
    • max+0.02095% CI +0.015 to +0.025 · 24,468,135 observations
    Nex-N2.5-Pro

    Not reported

    Source:Agent Arena leaderboard, 2026-11-11

  • ARC-AGI-2

    Best published score · Higher is better

    • DeepSeek V4.1 Flash 1017
      78.1%
      #20 of 85
    • Nex-N2.5-Pro
      Not reported
    Runs and sources
    DeepSeek V4.1 Flash 1017
    • none2.1%
    • low73.6%
    • high68.6%
    • max78.1%
    Nex-N2.5-Pro

    Not reported

    Source:External evaluation via Epoch AIOriginal-source terms apply

  • FrontierMath-Tier-4-v2-Private

    Best published score · Higher is better

    • DeepSeek V4.1 Flash 1017
      46.3%
      #23 of 72
    • Nex-N2.5-Pro
      Not reported
    Runs and sources
    DeepSeek V4.1 Flash 1017
    • max46.3%
    Nex-N2.5-Pro

    Not reported

    Source:Epoch AI evaluation

  • FrontierMath-Tiers-1-3-v2-Private

    Best published score · Higher is better

    • DeepSeek V4.1 Flash 1017
      71.2%
      #28 of 87
    • Nex-N2.5-Pro
      Not reported
    Runs and sources
    DeepSeek V4.1 Flash 1017
    • max71.2%
    Nex-N2.5-Pro

    Not reported

    Source:Epoch AI evaluation

  • GPQA diamond

    Best published score · Higher is better

    • DeepSeek V4.1 Flash 1017
      93.2%
      #20 of 161
    • Nex-N2.5-Pro
      Not reported
    Runs and sources
    DeepSeek V4.1 Flash 1017
    • max93.2%
    Nex-N2.5-Pro

    Not reported

    Source:Epoch AI evaluation

  • OTIS Mock AIME 2024-2025

    Best published score · Higher is better

    • DeepSeek V4.1 Flash 1017
      99.4%
      #15 of 158
    • Nex-N2.5-Pro
      Not reported
    Runs and sources
    DeepSeek V4.1 Flash 1017
    • max99.4%
    Nex-N2.5-Pro

    Not reported

    Source:Epoch AI evaluation

  • SimpleQA Verified

    Best published score · Higher is better

    • DeepSeek V4.1 Flash 1017
      42.5%
      #48 of 87
    • Nex-N2.5-Pro
      Not reported
    Runs and sources
    DeepSeek V4.1 Flash 1017
    • max42.5%
    Nex-N2.5-Pro

    Not reported

    Source:Epoch AI evaluation

Each model's best published result is shown; "Not reported" means no matched evaluation, not a score of zero. Arena and DeepSWE ranks are the leaderboards' own; other ranks are among catalogue models with a score. Results from different harnesses or settings are not directly comparable.

Original-source terms apply to evaluations credited to their original publishers.

Benchmark compilation: Epoch AI, Capabilities & benchmarking (CC BY attribution). Scores are converted to percentages and model names matched to the Vertical Tabs catalog. Individual evaluations are credited to their original sources. External results may carry separate licences and evaluation configurations; do not interpret scores from different harnesses as directly comparable.

Arena ratings: Arena (lmarena-ai/leaderboard-dataset), licensed CC BY 4.0. Ratings come from pairwise human votes and are only comparable within one leaderboard; the interval is Arena's 95% confidence interval. Model names are matched to the Vertical Tabs catalog.

Model specifications

Release date
October 17, 2026
September 8, 2026
Context window
1M
262K
Native context
—
—
Max output tokens
393,216
235,929
Knowledge cutoff
2025-05
—
Open weights
Open weights
Open weights
Parameter count
763B
397B

API pricing · USD per 1M tokens

Input
$0.15
$0.075
Output
$0.60
$0.25
Cached input
$0.003
$0.015
Cache write
—
—

Capabilities and modalities

Input modalities
text, image
text, image
Output modalities
text
text
Tool calling
Supported
Supported
Reasoning option
Supported
Supported
Supported options
frequency_penalty, include_reasoning, logit_bias, logprobs, max_completion_tokens, max_tokens, min_p, parallel_tool_calls, presence_penalty, reasoning, reasoning_effort, repetition_penalty, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_k, top_logprobs, top_p
include_reasoning, logprobs, max_tokens, reasoning, reasoning_effort, structured_outputs, temperature, tool_choice, tools, top_k, top_logprobs, top_p
Capabilities
—
—

Architecture and availability

Architecture
—
—
Model families
—
—
Tokenizer
DeepSeek
Qwen3
Instruction format
—
—
License
MIT
—
Providers
38
1
Provider endpoints
96
1
Ollama variants
0
0
Metadata source
ai-research
ai-research

A dash means the field is not reported. Provider-specific performance and pricing may differ.

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