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HomeLarge Language ModelsDeepSeek vs OpenAI o1
Published Mar 19, 2026 · Updated May 17, 2026 · Independent Analysis

DeepSeek vs OpenAI o1

Capability Overview
DeepSeek logo - software comparison
DeepSeekvs OpenAI o1
4.5/5-0.1 vs OpenAI o1
Only in DeepSeek
  • Open source
  • Code generation
  • Math solving
✓ Free planFrom $0.14/1M tokens50M+ users · est. 2023
OpenAI o1 logo - software comparison
OpenAI o1vs DeepSeek
4.6/5+0.1 vs DeepSeek
Only in OpenAI o1
  • PhD-level science
  • Advanced math
  • Complex coding
From $20/mo10M+ users · est. 2024

Real-World Scenarios: When to Choose Which

The question that matters: “In what situation will I regret choosing A over B after 3 months?”

Scenario: Derivative Pricing Calculated and Audited
DeepSeek
Derivative Pricing Calculated and Audited Step-by-Step

Chain-of-thought reasoning solves multi-step financial models in spreadsheet via API. Open-source architecture lets compliance teams audit exactly how each answer was reached.

OpenAI o1
Derivative Pricing Proofs Verified in 18 Minutes

Advanced math steps through each operation in chain-of-thought, catching sign errors and boundary conditions. Manual proof validation drops from 6 hours per model release.

DeepSeek Unique Strength
50K Daily Inferences at $0.14 per Million Tokens

Run on local infrastructure for high-volume APIs. At $0.14/million tokens versus $15 for LLM, startups process millions of queries monthly without vendor lock-in.

→ Choose DeepSeek if this scenario applies to you. OpenAI o1 doesn't offer a comparable solution.
DeepSeek Unique Strength
PDF Contracts with Embedded Charts Parsed Inside internal wiki

Multimodal feature parses documents containing tables and images within internal wiki. Liability clauses and compliance gaps extract with visual context - no separate image-to-text.

→ Choose DeepSeek if this scenario applies to you. OpenAI o1 doesn't offer a comparable solution.
OpenAI o1 Unique Strength
Kubernetes Manifests, Logs, and Traces Analyzed Together

The 128K context pastes full infrastructure configs alongside logs and network traces for root cause analysis. Race conditions across 50+ microservices identified in under 90.

→ Choose OpenAI o1 if this scenario applies to you. DeepSeek doesn't offer a comparable solution.
OpenAI o1 Unique Strength
500K-Line Monolith Refactored via Chained Function Calls

Function calling chains analysis, test generation, and PR submission in automated sequence. Hands-off migration from procedural to OOP patterns runs over weeks, not months.

→ Choose OpenAI o1 if this scenario applies to you. DeepSeek doesn't offer a comparable solution.

Pricing Intelligence

DeepSeek logo - software comparison

DeepSeek Plans

Free tier available

Free0
Free

You get basic access. Good enough for solo use and evaluation.

API
Custom

Custom pricing for SSO, SLA, dedicated support. Always negotiate - ask for pilot pricing if testing with <50 seats, and push for annual discount commitments. Compare enterprise quotes against OpenAI API's equivalent tier.

API Token Pricing
DeepSeek V4 Flash
In: $0.14Out: $0.28/1M tokens
DeepSeek V4 Pro
In: $1.74Out: $3.48/1M tokens
Full DeepSeek Pricing Breakdown →
OpenAI o1 logo - software comparison

OpenAI o1 Plans

Paid plans only

PlusBest Value
$20/month

$20/month gets you o1 access (limited), o1-mini included. Entry point - standard pricing for llm.

Pro
$200/month

$200/month gets you Unlimited o1, o1 pro mode. 900% more than Plus - justified only if you need the extras.

Full OpenAI o1 Pricing Breakdown →

Feature Matrix

15 differences found across 34 standardized features

Feature
DeepSeek
OpenAI o1
Free Tier
Mobile App
Enterprise/Team Plans
Image Understanding
Function Calling
Long Context (100K+)
Reasoning
Multi-modal
Streaming
Batch API
JSON Mode
System Prompts
Tool Use
Vision
Enterprise Plans
Total (raw)
8
20
DeepSeek Features
  • Open source
  • Chain-of-thought reasoning
  • Code generation
  • Math solving
  • Multimodal
  • API access
  • Local deployment
  • Cost-efficient
OpenAI o1 Features
  • Chain-of-thought reasoning
  • PhD-level science
  • Advanced math
  • Complex coding
  • 128K context
  • Vision
  • API access
  • Function calling
  • JSON mode
  • Streaming
  • System prompts
  • File uploads
  • Safety evaluation
  • STEM optimization
  • Batch API
  • Tool use
  • Document analysis
  • Benchmark-leading
  • Research tasks
  • Multi-step problem solving

Pros & Cons Face-Off

Evaluative strengths and weaknesses: not feature lists

Pros
  • +Free plan available
  • +Large user base (50M+)
  • +API access for custom integrations
Cons
  • AI output quality varies by use case
  • Some advanced features locked behind higher tiers
Pros
  • +Best reasoning & math performance
  • +PhD-level science benchmark leader
  • +Chain-of-thought transparency
  • +Excellent for complex coding
  • +Strong safety evaluation
Cons
  • Expensive - $200/mo for unlimited
  • Slower than GPT-4o (thinks longer)

At a Glance

User Rating
4.5/5vs4.6/5
DeepSeek
OpenAI o1
Starting Price
$0.14/1M tokensvs$20/mo
DeepSeek
OpenAI o1
Feature Count
8 featuresvs20 features
DeepSeek
OpenAI o1
User Base
50.0Mvs10.0M
DeepSeek
OpenAI o1

Frequently Asked Questions

Related Comparisons

Authored by Oleh Kem·Published Mar 19, 2026·Updated May 17, 2026·Our methodology
Price & Data Intelligence SyncLast verified: May 14, 2026 · CE-LLM-2026W20-9F9B66 · No changes detected
Up to date

Sources

  1. 1.DeepSeek Official PricingVendor pricing page
  2. 2.OpenAI o1 Official PricingVendor pricing page
  3. 3.DeepSeek Official WebsiteOfficial product website
  4. 4.OpenAI o1 Official WebsiteOfficial product website