Pairwise benchmark snapshot · Aug 16, 2026

Claude Opus 4 vs DeepSeek V4 Flash benchmark

Name: Claude Opus 4 vs DeepSeek V4 Flash AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Claude Opus 4 (Anthropic) and DeepSeek V4 Flash (DeepSeek) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Claude Opus 4 is ahead by 0 points (1,490 vs 1,490; seed-bootstrap (Aug 1, 2026)). On SWE-bench coding, Claude Opus 4 resolves 72.5% versus 71.2% (seed-bootstrap (Aug 1, 2026)). DeepSeek V4 Flash streams faster (142 tok/s) while DeepSeek V4 Flash is the cheaper output token ($0.28/1M). DeepSeek V4 Flash has the larger context window (1M tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

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Anthropic

Claude Opus 4

First Claude 4 Opus generation. Baseline for opus 4 vs opus 5.

Elo 1,490$75/1M out

DeepSeek

DeepSeek V4 Flash

DeepSeek Jul 31 2026 price-performance SKU. Public listings put it near $0.14/$0.28 per 1M tokens.

Elo 1,490$0.28/1M out

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Model A

Model B

Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Opus 4 (1)vsDeepSeek V4 Flash (8)

Claude Opus 4: 1W (11%)Overall: DeepSeek V4 FlashDeepSeek V4 Flash: 8W (89%)

← Claude Opus 41 tiesDeepSeek V4 Flash →

DeepSeek V4 Flash (3/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,490vs1,490

Coding Elo

1,502vs1,516

SWE-bench

72.5%vs71.2%

LiveBench

66.8%vs67.8%

GPQA Diamond

80.4%vs81.6%

Claude Opus 4: 1WDeepSeek V4 Flash: 3W

DeepSeek V4 Flash (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

58 tok/svs142 tok/s

Time to first token

390 msvs165 ms

Claude Opus 4: 0WDeepSeek V4 Flash: 2W

DeepSeek V4 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$75/1Mvs$0.28/1M

Input price

$15/1Mvs$0.14/1M

Context window

200kvs1M

Claude Opus 4: 0WDeepSeek V4 Flash: 3W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageDeepSeek V4 Flash 6/6

Preference Elo

Claude Opus 4

Tied rating

Throughput Speed

DeepSeek V4 Flash

84 tok/s faster

Price Efficiency

DeepSeek V4 Flash

$74.72/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,490

EloHigh is better

1,490

Code Elo

High is better

1,502

Code EloHigh is better

1,516+1%

LiveBench

High is better

66.8%

LiveBenchHigh is better

67.8%+1%

SWE-bench

High is better

+2%72.5%

SWE-benchHigh is better

71.2%

GPQA

High is better

80.4%

GPQAHigh is better

81.6%+1%

TTFT

Low is better

390 ms

TTFTLow is better

165 ms+136%

Speed

High is better

58 tok/s

SpeedHigh is better

142 tok/s+145%

In $

Low is better

$15/1M

In $Low is better

$0.14/1M+10614%

Out $

Low is better

$75/1M

Out $Low is better

$0.28/1M+26686%

Context

High is better

200k

ContextHigh is better

1M+424%

Interactive Simulator

Workload Cost & Savings Calculator

Simulate monthly production API costs based on published $/1M tokens.

Save up to 99% with DeepSeek V4 Flash

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

Claude Opus 4$1,650.00 / mo

In: $525.00Out: $1125.00

DeepSeek V4 Flash$9.10 / mo

In: $4.90Out: $4.20

Estimated Cost Delta

DeepSeek V4 Flash is estimated to save $1,640.90/month ($19,691/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Claude Opus 4:Pick Claude Opus 4 when repo-level coding accuracy is the constraint.
2
DeepSeek V4 Flash:Pick DeepSeek V4 Flash when you are optimizing output cost.
3
DeepSeek V4 Flash:Pick DeepSeek V4 Flash when time-to-first-token matters more than peak Elo.

Recommended Workload Routing

Repo / coding agentsClaude Opus 4

Higher SWE-bench (72.5%).

High-volume chatDeepSeek V4 Flash

Lower output list price ($0.28/1M).

Voice / low-latency UIDeepSeek V4 Flash

Lower TTFT (165 ms).

Long-document RAGDeepSeek V4 Flash

Larger window (1M).

Screenshots / visionClaude Opus 4

Claude Opus 4 is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Opus 4	Higher SWE-bench (72.5%).
High-volume chat	DeepSeek V4 Flash	Lower output list price ($0.28/1M).
Voice / low-latency UI	DeepSeek V4 Flash	Lower TTFT (165 ms).
Long-document RAG	DeepSeek V4 Flash	Larger window (1M).
Screenshots / vision	Claude Opus 4	Claude Opus 4 is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news

priceJul 31, 2026

DeepSeek V4 Flash (Jul 31): the $0.14/$0.28 price-performance SKU

Public listings put Flash near $0.14/$0.28 per 1M. That is a batch SKU, not a chatbot crown.

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LIVE

Anthropic

Claude Opus 4

Elo 1,490

LiveBench66.8%

SWE-bench72.5%

Speed58 tok/s

Output cost$75/1M

DeepSeek

DeepSeek V4 Flash

Elo 1,490

LiveBench67.8%

SWE-bench71.2%

Speed142 tok/s

Output cost$0.28/1M

Frequently Asked Questions

Which is better overall, Claude Opus 4 or DeepSeek V4 Flash?: Claude Opus 4 has the higher preference Elo in our latest snapshot (1,490). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Claude Opus 4 or DeepSeek V4 Flash?: Claude Opus 4 leads SWE-bench at 72.5% vs 71.2%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: DeepSeek V4 Flash output tokens are $0.28/1M versus $75/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Opus 4 or DeepSeek V4 Flash?: DeepSeek V4 Flash has the lower time-to-first-token (165 ms vs 390 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: DeepSeek V4 Flash accepts 1M tokens versus 200k.
Can I self-host either model?: DeepSeek V4 Flash is marked open-weights in our catalog. The other side is a closed API. Check the provider license before you ship weights.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Claude Opus 4 and DeepSeek V4 Flash Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Claude Opus 4 matchups →|All DeepSeek V4 Flash matchups →

Claude Opus 4 vs Claude 3 Opus (previous opus)Claude Opus 4 vs Claude Opus 4.5 (next opus)DeepSeek V4 Flash vs DeepSeek V4 Pro (previous deepseek)Claude Sonnet 4.5 vs DeepSeek V4 Flash Claude Sonnet 5 vs DeepSeek V4 Flash Claude Opus 4.5 vs DeepSeek V4 Flash

Claude Opus 4 vs DeepSeek V4 Flash benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Opus 4 (1)vsDeepSeek V4 Flash (8)

Claude Opus 4: 1W (11%)Overall: DeepSeek V4 FlashDeepSeek V4 Flash: 8W (89%)

← Claude Opus 41 tiesDeepSeek V4 Flash →

DeepSeek V4 Flash (3/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,490vs1,490

Coding Elo

1,502vs1,516

SWE-bench

72.5%vs71.2%

LiveBench

66.8%vs67.8%

GPQA Diamond

80.4%vs81.6%

Claude Opus 4: 1WDeepSeek V4 Flash: 3W

DeepSeek V4 Flash (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

58 tok/svs142 tok/s

Time to first token

390 msvs165 ms

Claude Opus 4: 0WDeepSeek V4 Flash: 2W

DeepSeek V4 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$75/1Mvs$0.28/1M

Input price

$15/1Mvs$0.14/1M

Context window

200kvs1M

Claude Opus 4: 0WDeepSeek V4 Flash: 3W

Recommended Workload Routing

Repo / coding agentsClaude Opus 4

Higher SWE-bench (72.5%).

High-volume chatDeepSeek V4 Flash

Lower output list price ($0.28/1M).

Voice / low-latency UIDeepSeek V4 Flash

Lower TTFT (165 ms).

Long-document RAGDeepSeek V4 Flash

Larger window (1M).

Screenshots / visionClaude Opus 4

Claude Opus 4 is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Opus 4	Higher SWE-bench (72.5%).
High-volume chat	DeepSeek V4 Flash	Lower output list price ($0.28/1M).
Voice / low-latency UI	DeepSeek V4 Flash	Lower TTFT (165 ms).
Long-document RAG	DeepSeek V4 Flash	Larger window (1M).
Screenshots / vision	Claude Opus 4	Claude Opus 4 is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, Claude Opus 4 or DeepSeek V4 Flash?

Claude Opus 4 has the higher preference Elo in our latest snapshot (1,490). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, Claude Opus 4 or DeepSeek V4 Flash?

Claude Opus 4 leads SWE-bench at 72.5% vs 71.2%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

DeepSeek V4 Flash output tokens are $0.28/1M versus $75/1M. Input prices and retry rates still move the real bill.

Which is faster, Claude Opus 4 or DeepSeek V4 Flash?

DeepSeek V4 Flash has the lower time-to-first-token (165 ms vs 390 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

DeepSeek V4 Flash accepts 1M tokens versus 200k.

Can I self-host either model?

DeepSeek V4 Flash is marked open-weights in our catalog. The other side is a closed API. Check the provider license before you ship weights.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Claude Opus 4 and DeepSeek V4 Flash Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

Claude Opus 4

DeepSeek V4 Flash

DeepSeek V4 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

DeepSeek V4 Flash (Jul 31): the $0.14/$0.28 price-performance SKU

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Claude Opus 4

DeepSeek V4 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

Claude Opus 4

DeepSeek V4 Flash

DeepSeek V4 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

DeepSeek V4 Flash (Jul 31): the $0.14/$0.28 price-performance SKU

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Claude Opus 4

DeepSeek V4 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons