Pairwise benchmark snapshot · Aug 16, 2026

Claude Haiku 4.5 vs Claude Sonnet 4.5 benchmark

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

This page compares Claude Haiku 4.5 (Anthropic) and Claude Sonnet 4.5 (Anthropic) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Claude Sonnet 4.5 is ahead by 86 points (1,524 vs 1,438; seed-bootstrap (Aug 1, 2026)). On SWE-bench coding, Claude Sonnet 4.5 resolves 70.1% versus 58.2% (seed-bootstrap (Aug 1, 2026)). Claude Haiku 4.5 streams faster (175 tok/s) while Claude Haiku 4.5 is the cheaper output token ($5/1M). Claude Sonnet 4.5 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.

Share Analysis:

WhatsApp Telegram X / Post LinkedIn Reddit

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

Anthropic

Claude Sonnet 4.5

Workhorse Anthropic model: most of Opus coding quality at a mid-tier price.

Elo 1,524$15/1M out

Swap or Add Any Model to this Matchup

Instant pairwise benchmark recalculation across 400+ LLMs

Model A

Model B

Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude 3.7 Sonnet vs GPT-5

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Haiku 4.5 (4)vsClaude Sonnet 4.5 (6)

Claude Haiku 4.5: 4W (40%)Overall: Claude Sonnet 4.5Claude Sonnet 4.5: 6W (60%)

← Claude Haiku 4.5Claude Sonnet 4.5 →

Claude Sonnet 4.5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,438vs1,524

Coding Elo

1,446vs1,531

SWE-bench

58.2%vs70.1%

LiveBench

62.4%vs67.4%

GPQA Diamond

74%vs80.2%

Claude Haiku 4.5: 0WClaude Sonnet 4.5: 5W

Claude Haiku 4.5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

175 tok/svs88 tok/s

Time to first token

95 msvs240 ms

Claude Haiku 4.5: 2WClaude Sonnet 4.5: 0W

Claude Haiku 4.5 (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$5/1Mvs$15/1M

Input price

$1/1Mvs$3/1M

Context window

200kvs1M

Claude Haiku 4.5: 2WClaude Sonnet 4.5: 1W

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 AdvantageClaude Sonnet 4.5 4/6

Preference Elo

Claude Sonnet 4.5

86 pts advantage

Throughput Speed

Claude Haiku 4.5

87 tok/s faster

Price Efficiency

Claude Haiku 4.5

$10.00/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,438

EloHigh is better

1,524+6%

Code Elo

High is better

1,446

Code EloHigh is better

1,531+6%

LiveBench

High is better

62.4%

LiveBenchHigh is better

67.4%+8%

SWE-bench

High is better

58.2%

SWE-benchHigh is better

70.1%+20%

GPQA

High is better

74%

GPQAHigh is better

80.2%+8%

TTFT

Low is better

+153%95 ms

TTFTLow is better

240 ms

Speed

High is better

+99%175 tok/s

SpeedHigh is better

88 tok/s

In $

Low is better

+200%$1/1M

In $Low is better

$3/1M

Out $

Low is better

+200%$5/1M

Out $Low is better

$15/1M

Context

High is better

200k

ContextHigh is better

1M+400%

Interactive Simulator

Workload Cost & Savings Calculator

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

Save up to 67% with Claude Haiku 4.5

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

Claude Sonnet 4.5$330.00 / mo

In: $105.00Out: $225.00

Estimated Cost Delta

Claude Haiku 4.5 is estimated to save $220.00/month ($2,640/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Claude Sonnet 4.5:Pick Claude Sonnet 4.5 when repo-level coding accuracy is the constraint.
2
Claude Haiku 4.5:Pick Claude Haiku 4.5 when you are optimizing output cost.
3
Claude Haiku 4.5:Pick Claude Haiku 4.5 when time-to-first-token matters more than peak Elo.

Recommended Workload Routing

Repo / coding agentsClaude Sonnet 4.5

Higher SWE-bench (70.1%).

High-volume chatClaude Haiku 4.5

Lower output list price ($5/1M).

Voice / low-latency UIClaude Haiku 4.5

Lower TTFT (95 ms).

Long-document RAGClaude Sonnet 4.5

Larger window (1M).

Screenshots / visionClaude Sonnet 4.5

Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 4.5).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Sonnet 4.5	Higher SWE-bench (70.1%).
High-volume chat	Claude Haiku 4.5	Lower output list price ($5/1M).
Voice / low-latency UI	Claude Haiku 4.5	Lower TTFT (95 ms).
Long-document RAG	Claude Sonnet 4.5	Larger window (1M).
Screenshots / vision	Claude Sonnet 4.5	Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 4.5).

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.

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.

launchFeb 18, 2026

Claude Sonnet 4.5 is the previous workhorse — still a valid vs baseline

Most of Opus 4.5 coding at a mid-tier price. Sonnet 5 replaced it as the buy; 4.5 remains a compare baseline.

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.

Community Sentiment

Cast Your Matchup Vote

0 total votes

Community Discussions (0)

No comments posted on this matchup yet. Be the first to share an evaluation note!

Share card

The real PNG is generated at /compare/claude-haiku-4-5-vs-claude-sonnet-4-5/opengraph-image for crawlers.

PNG

CompareLLM Matrix

Verified head-to-head card

LIVE

Anthropic

Claude Haiku 4.5

Elo 1,438

LiveBench62.4%

SWE-bench58.2%

Speed175 tok/s

Output cost$5/1M

Anthropic

Claude Sonnet 4.5

Elo 1,524

LiveBench67.4%

SWE-bench70.1%

Speed88 tok/s

Output cost$15/1M

Frequently Asked Questions

Which is better overall, Claude Haiku 4.5 or Claude Sonnet 4.5?: Claude Sonnet 4.5 has the higher preference Elo in our latest snapshot (1,524). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Claude Haiku 4.5 or Claude Sonnet 4.5?: Claude Sonnet 4.5 leads SWE-bench at 70.1% vs 58.2%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: Claude Haiku 4.5 output tokens are $5/1M versus $15/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Haiku 4.5 or Claude Sonnet 4.5?: Claude Haiku 4.5 has the lower time-to-first-token (95 ms vs 240 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: Claude Sonnet 4.5 accepts 1M tokens versus 200k.
Can I self-host either model?: Neither model is marked open-weights here. You are comparing hosted APIs.
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 Claude Sonnet 4.5 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 Claude Sonnet 4.5 matchups →

Claude Haiku 4.5 vs Claude 3.5 Haiku (previous haiku)Claude Sonnet 4.5 vs Claude Sonnet 4 (previous sonnet)Claude Sonnet 4.5 vs Claude Sonnet 5 (next sonnet)Claude Opus 4.5 vs Claude Sonnet 4.5 Claude Opus 4.6 vs Claude Sonnet 4.5 Claude Opus 5 vs Claude Sonnet 4.5

Claude Haiku 4.5 vs Claude Sonnet 4.5 benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Haiku 4.5 (4)vsClaude Sonnet 4.5 (6)

Claude Haiku 4.5: 4W (40%)Overall: Claude Sonnet 4.5Claude Sonnet 4.5: 6W (60%)

← Claude Haiku 4.5Claude Sonnet 4.5 →

Claude Sonnet 4.5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,438vs1,524

Coding Elo

1,446vs1,531

SWE-bench

58.2%vs70.1%

LiveBench

62.4%vs67.4%

GPQA Diamond

74%vs80.2%

Claude Haiku 4.5: 0WClaude Sonnet 4.5: 5W

Claude Haiku 4.5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

175 tok/svs88 tok/s

Time to first token

95 msvs240 ms

Claude Haiku 4.5: 2WClaude Sonnet 4.5: 0W

Claude Haiku 4.5 (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$5/1Mvs$15/1M

Input price

$1/1Mvs$3/1M

Context window

200kvs1M

Claude Haiku 4.5: 2WClaude Sonnet 4.5: 1W

Recommended Workload Routing

Repo / coding agentsClaude Sonnet 4.5

Higher SWE-bench (70.1%).

High-volume chatClaude Haiku 4.5

Lower output list price ($5/1M).

Voice / low-latency UIClaude Haiku 4.5

Lower TTFT (95 ms).

Long-document RAGClaude Sonnet 4.5

Larger window (1M).

Screenshots / visionClaude Sonnet 4.5

Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 4.5).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Sonnet 4.5	Higher SWE-bench (70.1%).
High-volume chat	Claude Haiku 4.5	Lower output list price ($5/1M).
Voice / low-latency UI	Claude Haiku 4.5	Lower TTFT (95 ms).
Long-document RAG	Claude Sonnet 4.5	Larger window (1M).
Screenshots / vision	Claude Sonnet 4.5	Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 4.5).

Frequently Asked Questions

Which is better overall, Claude Haiku 4.5 or Claude Sonnet 4.5?

Claude Sonnet 4.5 has the higher preference Elo in our latest snapshot (1,524). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, Claude Haiku 4.5 or Claude Sonnet 4.5?

Claude Sonnet 4.5 leads SWE-bench at 70.1% vs 58.2%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

Claude Haiku 4.5 output tokens are $5/1M versus $15/1M. Input prices and retry rates still move the real bill.

Which is faster, Claude Haiku 4.5 or Claude Sonnet 4.5?

Claude Haiku 4.5 has the lower time-to-first-token (95 ms vs 240 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

Claude Sonnet 4.5 accepts 1M tokens versus 200k.

Can I self-host either model?

Neither model is marked open-weights here. You are comparing hosted APIs.

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 Claude Sonnet 4.5 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 Sonnet 4.5

Claude Haiku 4.5

Claude Haiku 4.5

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

Llama 4 Scout: long-context open sibling of Maverick

Claude Sonnet 4.5 is the previous workhorse — still a valid vs baseline

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

Claude Sonnet 4.5

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 Sonnet 4.5

Claude Haiku 4.5

Claude Haiku 4.5

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

Llama 4 Scout: long-context open sibling of Maverick

Claude Sonnet 4.5 is the previous workhorse — still a valid vs baseline

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

Claude Sonnet 4.5

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons