Pairwise benchmark snapshot · Aug 16, 2026

Claude Haiku 4.5 vs DeepSeek V4 Flash benchmark

Name: Claude Haiku 4.5 vs DeepSeek V4 Flash AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Claude Haiku 4.5 (Anthropic) and DeepSeek V4 Flash (DeepSeek) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, DeepSeek V4 Flash is ahead by 52 points (1,490 vs 1,438; seed-bootstrap (Aug 16, 2026)). On SWE-bench coding, DeepSeek V4 Flash resolves 71.2% versus 58.2% (seed-bootstrap (Aug 16, 2026)). Claude Haiku 4.5 streams faster (175 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 Haiku 4.5

Anthropic cheap/fast Claude SKU. Official Claude Platform list price $1/$5 per 1M tokens (Anthropic Haiku page).

Elo 1,438$5/1M 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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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 Haiku 4.5 (2)vsDeepSeek V4 Flash (8)

Claude Haiku 4.5: 2W (20%)Overall: DeepSeek V4 FlashDeepSeek V4 Flash: 8W (80%)

← Claude Haiku 4.5DeepSeek V4 Flash →

DeepSeek V4 Flash (5/5)

Intelligence & Reasoning

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

Preference Elo

1,438vs1,490

Coding Elo

1,446vs1,516

SWE-bench

58.2%vs71.2%

LiveBench

62.4%vs67.8%

GPQA Diamond

74%vs81.6%

Claude Haiku 4.5: 0WDeepSeek V4 Flash: 5W

Claude Haiku 4.5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

175 tok/svs142 tok/s

Time to first token

95 msvs165 ms

Claude Haiku 4.5: 2WDeepSeek V4 Flash: 0W

DeepSeek V4 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$5/1Mvs$0.28/1M

Input price

$1/1Mvs$0.14/1M

Context window

200kvs1M

Claude Haiku 4.5: 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 5/6

Preference Elo

DeepSeek V4 Flash

52 pts advantage

Throughput Speed

Claude Haiku 4.5

33 tok/s faster

Price Efficiency

DeepSeek V4 Flash

$4.72/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,438

EloHigh is better

1,490+4%

Code Elo

High is better

1,446

Code EloHigh is better

1,516+5%

LiveBench

High is better

62.4%

LiveBenchHigh is better

67.8%+9%

SWE-bench

High is better

58.2%

SWE-benchHigh is better

71.2%+22%

GPQA

High is better

74%

GPQAHigh is better

81.6%+10%

TTFT

Low is better

+74%95 ms

TTFTLow is better

165 ms

Speed

High is better

+23%175 tok/s

SpeedHigh is better

142 tok/s

In $

Low is better

$1/1M

In $Low is better

$0.14/1M+614%

Out $

Low is better

$5/1M

Out $Low is better

$0.28/1M+1686%

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 92% 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 Haiku 4.5$110.00 / mo

In: $35.00Out: $75.00

DeepSeek V4 Flash$9.10 / mo

In: $4.90Out: $4.20

Estimated Cost Delta

DeepSeek V4 Flash is estimated to save $100.90/month ($1,211/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
DeepSeek V4 Flash:Pick DeepSeek V4 Flash when repo-level coding accuracy is the constraint.
2
Claude Haiku 4.5:Pick Claude Haiku 4.5 when time-to-first-token matters more than peak Elo.
3
DeepSeek V4 Flash:Pick DeepSeek V4 Flash for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsDeepSeek V4 Flash

Higher SWE-bench (71.2%).

High-volume chatDeepSeek V4 Flash

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

Voice / low-latency UIClaude Haiku 4.5

Lower TTFT (95 ms).

Long-document RAGDeepSeek V4 Flash

Larger window (1M).

Screenshots / visionClaude Haiku 4.5

Claude Haiku 4.5 is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	DeepSeek V4 Flash	Higher SWE-bench (71.2%).
High-volume chat	DeepSeek V4 Flash	Lower output list price ($0.28/1M).
Voice / low-latency UI	Claude Haiku 4.5	Lower TTFT (95 ms).
Long-document RAG	DeepSeek V4 Flash	Larger window (1M).
Screenshots / vision	Claude Haiku 4.5	Claude Haiku 4.5 is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news

compareAug 16, 2026

Haiku 4.5 vs Llama 4 Scout: cheap Claude versus cheap open Llama

$1/$5 hosted Claude vs a cheap long-context open sibling. The alternative-to-Sonnet pair that is honest.

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.

launchApr 8, 2026

Llama 4 Scout: long-context open sibling of Maverick

Huge window, cheap hosted lists. The Haiku alternative that is actually open-weight.

launchOct 22, 2025

Claude Haiku 4.5 at $1/$5: the cheap Claude people actually ship

Official Anthropic list $1/$5. This is the SKU behind “cheapest Claude alternative” that is still Claude.

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LIVE

Anthropic

Claude Haiku 4.5

Elo 1,438

LiveBench62.4%

SWE-bench58.2%

Speed175 tok/s

Output cost$5/1M

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 Haiku 4.5 or DeepSeek V4 Flash?: DeepSeek V4 Flash 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 Haiku 4.5 or DeepSeek V4 Flash?: DeepSeek V4 Flash leads SWE-bench at 71.2% vs 58.2%. 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 $5/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Haiku 4.5 or DeepSeek V4 Flash?: Claude Haiku 4.5 has the lower time-to-first-token (95 ms vs 165 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 Haiku 4.5 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 Haiku 4.5 matchups →|All DeepSeek V4 Flash matchups →

Claude Haiku 4.5 vs Claude 3.5 Haiku (previous haiku)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 4.6 vs DeepSeek V4 Flash

Claude Haiku 4.5 vs DeepSeek V4 Flash benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Haiku 4.5 (2)vsDeepSeek V4 Flash (8)

Claude Haiku 4.5: 2W (20%)Overall: DeepSeek V4 FlashDeepSeek V4 Flash: 8W (80%)

← Claude Haiku 4.5DeepSeek V4 Flash →

DeepSeek V4 Flash (5/5)

Intelligence & Reasoning

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

Preference Elo

1,438vs1,490

Coding Elo

1,446vs1,516

SWE-bench

58.2%vs71.2%

LiveBench

62.4%vs67.8%

GPQA Diamond

74%vs81.6%

Claude Haiku 4.5: 0WDeepSeek V4 Flash: 5W

Claude Haiku 4.5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

175 tok/svs142 tok/s

Time to first token

95 msvs165 ms

Claude Haiku 4.5: 2WDeepSeek V4 Flash: 0W

DeepSeek V4 Flash (3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$5/1Mvs$0.28/1M

Input price

$1/1Mvs$0.14/1M

Context window

200kvs1M

Claude Haiku 4.5: 0WDeepSeek V4 Flash: 3W

Recommended Workload Routing

Repo / coding agentsDeepSeek V4 Flash

Higher SWE-bench (71.2%).

High-volume chatDeepSeek V4 Flash

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

Voice / low-latency UIClaude Haiku 4.5

Lower TTFT (95 ms).

Long-document RAGDeepSeek V4 Flash

Larger window (1M).

Screenshots / visionClaude Haiku 4.5

Claude Haiku 4.5 is the side marked multimodal in the catalog.

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	DeepSeek V4 Flash	Higher SWE-bench (71.2%).
High-volume chat	DeepSeek V4 Flash	Lower output list price ($0.28/1M).
Voice / low-latency UI	Claude Haiku 4.5	Lower TTFT (95 ms).
Long-document RAG	DeepSeek V4 Flash	Larger window (1M).
Screenshots / vision	Claude Haiku 4.5	Claude Haiku 4.5 is the side marked multimodal in the catalog.

Frequently Asked Questions

Which is better overall, Claude Haiku 4.5 or DeepSeek V4 Flash?

DeepSeek V4 Flash 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 Haiku 4.5 or DeepSeek V4 Flash?

DeepSeek V4 Flash leads SWE-bench at 71.2% vs 58.2%. 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 $5/1M. Input prices and retry rates still move the real bill.

Which is faster, Claude Haiku 4.5 or DeepSeek V4 Flash?

Claude Haiku 4.5 has the lower time-to-first-token (95 ms vs 165 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 Haiku 4.5 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

DeepSeek V4 Flash

Claude Haiku 4.5

DeepSeek V4 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Haiku 4.5 vs Llama 4 Scout: cheap Claude versus cheap open Llama

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

Llama 4 Scout: long-context open sibling of Maverick

Claude Haiku 4.5 at $1/$5: the cheap Claude people actually ship

Cast Your Matchup Vote

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CompareLLM Matrix

Claude Haiku 4.5

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

DeepSeek V4 Flash

Claude Haiku 4.5

DeepSeek V4 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Haiku 4.5 vs Llama 4 Scout: cheap Claude versus cheap open Llama

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

Llama 4 Scout: long-context open sibling of Maverick

Claude Haiku 4.5 at $1/$5: the cheap Claude people actually ship

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Claude Haiku 4.5

DeepSeek V4 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons