Pairwise benchmark snapshot · Aug 16, 2026

Claude Haiku 4.5 vs Claude Sonnet 5 benchmark

Name: Claude Haiku 4.5 vs Claude Sonnet 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 5 (Anthropic) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Claude Sonnet 5 is ahead by 118 points (1,556 vs 1,438; seed-bootstrap (Aug 16, 2026)). On SWE-bench coding, Claude Sonnet 5 resolves 73.8% versus 58.2% (seed-bootstrap (Aug 16, 2026)). Claude Haiku 4.5 streams faster (175 tok/s) while Claude Haiku 4.5 is the cheaper output token ($5/1M). Claude Sonnet 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.

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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

Anthropic

Claude Sonnet 5

Anthropic workhorse. Official $2/$10 per 1M tokens made permanent on Aug 10 2026.

Elo 1,556$10/1M 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 Haiku 4.5 (4)vsClaude Sonnet 5 (6)

Claude Haiku 4.5: 4W (40%)Overall: Claude Sonnet 5Claude Sonnet 5: 6W (60%)

← Claude Haiku 4.5Claude Sonnet 5 →

Claude Sonnet 5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,438vs1,556

Coding Elo

1,446vs1,562

SWE-bench

58.2%vs73.8%

LiveBench

62.4%vs70.4%

GPQA Diamond

74%vs82.8%

Claude Haiku 4.5: 0WClaude Sonnet 5: 5W

Claude Haiku 4.5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

175 tok/svs118 tok/s

Time to first token

95 msvs175 ms

Claude Haiku 4.5: 2WClaude Sonnet 5: 0W

Claude Haiku 4.5 (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$5/1Mvs$10/1M

Input price

$1/1Mvs$2/1M

Context window

200kvs1M

Claude Haiku 4.5: 2WClaude Sonnet 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 5 4/6

Preference Elo

Claude Sonnet 5

118 pts advantage

Throughput Speed

Claude Haiku 4.5

57 tok/s faster

Price Efficiency

Claude Haiku 4.5

$5.00/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,438

EloHigh is better

1,556+8%

Code Elo

High is better

1,446

Code EloHigh is better

1,562+8%

LiveBench

High is better

62.4%

LiveBenchHigh is better

70.4%+13%

SWE-bench

High is better

58.2%

SWE-benchHigh is better

73.8%+27%

GPQA

High is better

74%

GPQAHigh is better

82.8%+12%

TTFT

Low is better

+84%95 ms

TTFTLow is better

175 ms

Speed

High is better

+48%175 tok/s

SpeedHigh is better

118 tok/s

In $

Low is better

+100%$1/1M

In $Low is better

$2/1M

Out $

Low is better

+100%$5/1M

Out $Low is better

$10/1M

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 50% 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 5$220.00 / mo

In: $70.00Out: $150.00

Estimated Cost Delta

Claude Haiku 4.5 is estimated to save $110.00/month ($1,320/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Claude Sonnet 5:Pick Claude Sonnet 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 5

Higher SWE-bench (73.8%).

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 5

Larger window (1M).

Screenshots / visionClaude Sonnet 5

Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 5).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Sonnet 5	Higher SWE-bench (73.8%).
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 5	Larger window (1M).
Screenshots / vision	Claude Sonnet 5	Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 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.

compareAug 10, 2026

Sonnet vs Opus in 2026: same family, different invoice

Usually Sonnet 5 vs Opus 5. Coding delta versus output $/1M. The workhorse question.

priceAug 10, 2026

Claude Sonnet 5 at $2/$10: the 2026 Anthropic workhorse

Aug 10 2026 made the $2/$10 list permanent. Sonnet is the default Claude unless the repo is actually on fire.

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.

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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

Anthropic

Claude Sonnet 5

Elo 1,556

LiveBench70.4%

SWE-bench73.8%

Speed118 tok/s

Output cost$10/1M

Frequently Asked Questions

Which is better overall, Claude Haiku 4.5 or Claude Sonnet 5?: Claude Sonnet 5 has the higher preference Elo in our latest snapshot (1,556). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Claude Haiku 4.5 or Claude Sonnet 5?: Claude Sonnet 5 leads SWE-bench at 73.8% 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 $10/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Haiku 4.5 or Claude Sonnet 5?: Claude Haiku 4.5 has the lower time-to-first-token (95 ms vs 175 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: Claude Sonnet 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 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 5 matchups →

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

Claude Haiku 4.5 vs Claude Sonnet 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 5 (6)

Claude Haiku 4.5: 4W (40%)Overall: Claude Sonnet 5Claude Sonnet 5: 6W (60%)

← Claude Haiku 4.5Claude Sonnet 5 →

Claude Sonnet 5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,438vs1,556

Coding Elo

1,446vs1,562

SWE-bench

58.2%vs73.8%

LiveBench

62.4%vs70.4%

GPQA Diamond

74%vs82.8%

Claude Haiku 4.5: 0WClaude Sonnet 5: 5W

Claude Haiku 4.5 (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

175 tok/svs118 tok/s

Time to first token

95 msvs175 ms

Claude Haiku 4.5: 2WClaude Sonnet 5: 0W

Claude Haiku 4.5 (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$5/1Mvs$10/1M

Input price

$1/1Mvs$2/1M

Context window

200kvs1M

Claude Haiku 4.5: 2WClaude Sonnet 5: 1W

Recommended Workload Routing

Repo / coding agentsClaude Sonnet 5

Higher SWE-bench (73.8%).

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 5

Larger window (1M).

Screenshots / visionClaude Sonnet 5

Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 5).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Sonnet 5	Higher SWE-bench (73.8%).
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 5	Larger window (1M).
Screenshots / vision	Claude Sonnet 5	Both accept images. Defaulting to the higher-Elo side (Claude Sonnet 5).

Frequently Asked Questions

Which is better overall, Claude Haiku 4.5 or Claude Sonnet 5?

Claude Sonnet 5 has the higher preference Elo in our latest snapshot (1,556). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, Claude Haiku 4.5 or Claude Sonnet 5?

Claude Sonnet 5 leads SWE-bench at 73.8% 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 $10/1M. Input prices and retry rates still move the real bill.

Which is faster, Claude Haiku 4.5 or Claude Sonnet 5?

Claude Haiku 4.5 has the lower time-to-first-token (95 ms vs 175 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

Claude Sonnet 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 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 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

Sonnet vs Opus in 2026: same family, different invoice

Claude Sonnet 5 at $2/$10: the 2026 Anthropic workhorse

Llama 4 Scout: long-context open sibling of Maverick

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Claude Haiku 4.5

Claude Sonnet 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 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

Sonnet vs Opus in 2026: same family, different invoice

Claude Sonnet 5 at $2/$10: the 2026 Anthropic workhorse

Llama 4 Scout: long-context open sibling of Maverick

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Claude Haiku 4.5

Claude Sonnet 5

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons