DeepSeek V4 Pro vs o3 Deep Research

DeepSeek V4 Pro (2026) and o3 Deep Research (2025) are frontier-tier reasoning models from DeepSeek and OpenAI. DeepSeek V4 Pro ships a 1m-token context window, while o3 Deep Research ships a 200k-token context window. On pricing, DeepSeek V4 Pro costs $0.43/1M input tokens versus $10/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.

DeepSeek V4 Pro is ~2199% cheaper at $0.43/1M; pay for o3 Deep Research only for vision-heavy evaluation.

Decision scorecard

Local evidence first
SignalDeepSeek V4 Proo3 Deep Research
Best forreasoning-heavy apps, tool-calling agents, and long-context analysisreasoning-heavy apps, multimodal apps, and tool-calling agents
Decision fitCoding, RAG, and AgentsRAG, Agents, and Long context
Context window1m200k
Cheapest output$0.87/1M tokens$40/1M tokens
Provider routes6 tracked2 tracked
Shared benchmarks0 shared0 shared

Decision tradeoffs

Choose DeepSeek V4 Pro when...
  • DeepSeek V4 Pro has the larger context window for long prompts, retrieval packs, or transcript analysis.
  • DeepSeek V4 Pro has the lower cheapest tracked output price at $0.87/1M tokens.
  • DeepSeek V4 Pro has broader tracked provider coverage for fallback and route flexibility.
  • Local decision data tags DeepSeek V4 Pro for Coding, RAG, and Agents.
Choose o3 Deep Research when...
  • o3 Deep Research uniquely exposes Vision and Multimodal in local model data.
  • Local decision data tags o3 Deep Research for RAG, Agents, and Long context.

Monthly cost at traffic

Estimate token spend from the cheapest tracked input and output route or tier on this page.

Lower estimate DeepSeek V4 Pro

DeepSeek V4 Pro

$566

Cheapest tracked route/tier: DeepSeek Platform

o3 Deep Research

$18,000

Cheapest tracked route/tier: Vercel AI Gateway

Estimated monthly gap: $17,435. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

DeepSeek V4 Pro -> o3 Deep Research
  • Provider overlap exists on Vercel AI Gateway; start route-level A/B tests there.
  • o3 Deep Research is $39.13/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
  • o3 Deep Research adds Vision and Multimodal in local capability data.
o3 Deep Research -> DeepSeek V4 Pro
  • Provider overlap exists on Vercel AI Gateway; start route-level A/B tests there.
  • DeepSeek V4 Pro is $39.13/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
  • Check replacement coverage for Vision and Multimodal before moving production traffic.

Specs

Specification
Released2026-04-242025-10-10
Context window1m200k
Parameters1.6T—
ArchitectureMixture of ExpertsDecoder Only
LicenseMITOSI-approvedProprietary
OpennessOpen sourceProprietary
WeightsAvailableNot released
CodeUnknownUnknown
Commercial useCommercial use: permittedCommercial use: conditional
Knowledge cutoff-2024-06

Pricing and availability

Pricing attributeDeepSeek V4 Proo3 Deep Research
Input price$0.43/1M tokens$10/1M tokens
Output price$0.87/1M tokens$40/1M tokens
Providers
DeepSeek PlatformFireworks AIOpenRouterVercel AI GatewayNovita AIFeatherless
Vercel AI GatewayOpenAI API

Capabilities

CapabilityDeepSeek V4 Proo3 Deep Research
VisionNoYes
MultimodalNoYes
ReasoningYesYes
JSON / Tool useYesYes
Structured outputsYesYes
Code executionNoNo
IDE integrationNoNo
Computer useNoNo
Parallel agentsNoNo

Benchmarks

No shared benchmark scores are currently available for this pair.

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Last reviewed: 2026-09-24. Data sourced from public model cards and provider documentation.