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Head-to-head comparison

DeepSeek V3.1 Terminus vs Mistral Large 3 2512

DeepSeek V3.1 Terminus (DeepSeek) and Mistral Large 3 2512 (Mistral AI) 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, Mistral Large 3 2512 holds the stronger ModelCap Index position (#59 vs #62); DeepSeek V3.1 Terminus is 1.5× cheaper per output token ($1.00/1M vs $1.50/1M); Mistral Large 3 2512 offers the longer context window (262K vs 164K tokens); and DeepSeek V3.1 Terminus ships open weights.

Which should you choose?

Choose DeepSeek V3.1 Terminus if…

  • API cost matters — $1.00/1M output tokens against $1.50/1M, about 1.5× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.27/1M against $0.50/1M.
  • you want to self-host: DeepSeek V3.1 Terminus ships open weights while Mistral Large 3 2512 is api only.
  • you want provider choice — 4 listed API providers against 1.

Choose Mistral Large 3 2512 if…

  • you want the stronger overall ModelCap Index position — #59 against #62 (55.1 vs 54.0 points).
  • you need the longer context window — 262K tokens against 164K.
  • Arena coding is your yardstick — 1469 against 1461.
  • you want the more recently listed model — Mistral Large 3 2512 was listed 1 December 2025, DeepSeek V3.1 Terminus 22 September 2025.

DeepSeek V3.1 Terminus vs Mistral Large 3 2512: specs, pricing and context

Specification comparison of DeepSeek V3.1 Terminus and Mistral Large 3 2512
FieldDeepSeek V3.1 TerminusDeepSeekMistral Large 3 2512Mistral AI
ModelCap Index position#62#59
Index score54.055.1
EvidenceMeasuredMeasured
Input price / 1M tokens$0.27$0.50
Output price / 1M tokens$1.00$1.50
Context window164K tokens262K tokens
Max output tokens33K210K
API providers listed41
Weight accessOpen weightsAPI only
Input modalitiesTextText, Image, File
First listed22 September 20251 December 2025
PublisherDeepSeekMistral AI

Evidence: 3 public benchmark observations across 3 boards · 2 public benchmark observations across 2 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: DeepSeek V3.1 Terminus vs Mistral Large 3 2512

Public benchmark boards where DeepSeek V3.1 Terminus or Mistral Large 3 2512 has a published result
BoardDeepSeek V3.1 TerminusMistral Large 3 2512Leads
Arena codingArena (LMArena)14611438–1485Thinking14691464–1474Mistral Large 3 2512
AA Intelligence IndexArtificial Analysis15.4intelligence-index:v4.3:reasoning-unspecified—Only one result
AA Terminal-Bench 2.1Artificial Analysis44.9%terminal-bench:2.1:terminus-2:e2b:pass-at-1:3-repeats:source-model="DeepSeek V3.1 Terminus":reasoning=true—Only one result
AA τ²-Bench TelecomArtificial Analysis37.1%tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="DeepSeek V3.1 Terminus (Non-reasoning)":reasoning=false—Only one result
AA Humanity's Last ExamArtificial Analysis8.7%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="DeepSeek V3.1 Terminus (Non-reasoning)":reasoning=false—Only 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.

DeepSeek V3.1 Terminus vs Mistral Large 3 2512: common questions

Is DeepSeek V3.1 Terminus better than Mistral Large 3 2512?

Mistral Large 3 2512 ranks higher on the ModelCap Index as of 9 September 2026: #59 against #62. 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 DeepSeek V3.1 Terminus cheaper than Mistral Large 3 2512?

DeepSeek V3.1 Terminus is cheaper on output tokens: $1.00/1M against $1.50/1M. Input tokens are $0.27/1M for DeepSeek V3.1 Terminus and $0.50/1M for Mistral Large 3 2512. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $1.04 for DeepSeek V3.1 Terminus versus $1.75 for Mistral Large 3 2512. DeepSeek V3.1 Terminus costs 40.6% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.

Which has the bigger context window, DeepSeek V3.1 Terminus or Mistral Large 3 2512?

Mistral Large 3 2512 has the larger context window: 262K tokens against 164K.

Which is better for coding, DeepSeek V3.1 Terminus or Mistral Large 3 2512?

Arena coding: DeepSeek V3.1 Terminus 1461, Mistral Large 3 2512 1469 — Mistral Large 3 2512 leads.

Are DeepSeek V3.1 Terminus and Mistral Large 3 2512 open-weight models?

DeepSeek V3.1 Terminus: Open weights. Mistral Large 3 2512: 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 DeepSeek V3.1 Terminus and Mistral Large 3 2512?

ModelCap currently lists 4 API providers for DeepSeek V3.1 Terminus and 1 for Mistral Large 3 2512, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this DeepSeek V3.1 Terminus vs Mistral Large 3 2512 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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