Pairwise benchmark snapshot · Aug 16, 2026

Claude Opus 4.5 vs GPT-4o benchmark

Name: Claude Opus 4.5 vs GPT-4o AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Claude Opus 4.5 (Anthropic) and GPT-4o (OpenAI) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Claude Opus 4.5 is ahead by 233 points (1,568 vs 1,335; seed-bootstrap (Aug 1, 2026)). On SWE-bench coding, Claude Opus 4.5 resolves 76.8% versus 54.8% (seed-bootstrap (Aug 1, 2026)). GPT-4o streams faster (110 tok/s) while GPT-4o is the cheaper output token ($10/1M). Claude Opus 4.5 has the larger context window (200k 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 4.5

Anthropic frontier coding and computer-use model. SWE-bench leader on the official mini-SWE-agent harness in the Feb 2026 refresh.

Elo 1,568$25/1M out

OpenAI

GPT-4o

Previous OpenAI flagship. Still a common compare baseline on legacy pages.

Elo 1,335$10/1M out

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Quick vs:vs Claude Opus 4.6 vs Claude Sonnet 4.5 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 Opus 4.5 (6)vsGPT-4o (4)

Claude Opus 4.5: 6W (60%)Overall: Claude Opus 4.5GPT-4o: 4W (40%)

← Claude Opus 4.5GPT-4o →

Claude Opus 4.5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,568vs1,335

Coding Elo

1,574vs—

SWE-bench

76.8%vs54.8%

LiveBench

71.2%vs54.2%

GPQA Diamond

84.1%vs73.2%

Claude Opus 4.5: 5WGPT-4o: 0W

GPT-4o (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

62 tok/svs110 tok/s

Time to first token

380 msvs180 ms

Claude Opus 4.5: 0WGPT-4o: 2W

GPT-4o (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$25/1Mvs$10/1M

Input price

$5/1Mvs$2.5/1M

Context window

200kvs128k

Claude Opus 4.5: 1WGPT-4o: 2W

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 Opus 4.5 4/6

Preference Elo

Claude Opus 4.5

233 pts advantage

Throughput Speed

GPT-4o

48 tok/s faster

Price Efficiency

GPT-4o

$15.00/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

+17%1,568

EloHigh is better

1,335

Code Elo

High is better

1,574

Code EloHigh is better

—

LiveBench

High is better

+31%71.2%

LiveBenchHigh is better

54.2%

SWE-bench

High is better

+40%76.8%

SWE-benchHigh is better

54.8%

GPQA

High is better

+15%84.1%

GPQAHigh is better

73.2%

TTFT

Low is better

380 ms

TTFTLow is better

180 ms+111%

Speed

High is better

62 tok/s

SpeedHigh is better

110 tok/s+77%

In $

Low is better

$5/1M

In $Low is better

$2.5/1M+100%

Out $

Low is better

$25/1M

Out $Low is better

$10/1M+150%

Context

High is better

+56%200k

ContextHigh is better

128k

Interactive Simulator

Workload Cost & Savings Calculator

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

Save up to 57% with GPT-4o

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 4.5$550.00 / mo

In: $175.00Out: $375.00

GPT-4o$237.50 / mo

In: $87.50Out: $150.00

Estimated Cost Delta

GPT-4o is estimated to save $312.50/month ($3,750/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Claude Opus 4.5:Pick Claude Opus 4.5 when repo-level coding accuracy is the constraint.
2
GPT-4o:Pick GPT-4o when you are optimizing output cost.
3
GPT-4o:Pick GPT-4o when time-to-first-token matters more than peak Elo.

Recommended Workload Routing

Repo / coding agentsClaude Opus 4.5

Higher SWE-bench (76.8%).

High-volume chatGPT-4o

Lower output list price ($10/1M).

Voice / low-latency UIGPT-4o

Lower TTFT (180 ms).

Long-document RAGClaude Opus 4.5

Larger window (200k).

Screenshots / visionClaude Opus 4.5

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

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Opus 4.5	Higher SWE-bench (76.8%).
High-volume chat	GPT-4o	Lower output list price ($10/1M).
Voice / low-latency UI	GPT-4o	Lower TTFT (180 ms).
Long-document RAG	Claude Opus 4.5	Larger window (200k).
Screenshots / vision	Claude Opus 4.5	Both accept images. Defaulting to the higher-Elo side (Claude Opus 4.5).

Related Editorial Dispatches & Benchmark Notes

View all news

launchFeb 20, 2026

Claude Opus 4.5 and the Feb 2026 SWE-bench row we still cite

The Feb refresh made 4.5 a coding reference. Newer Opus SKUs exist; this row stays as the dated harness point.

newsMay 13, 2024

GPT-4o stays as the 2024 compare anchor people still search

Deprecated for buying. Kept because “4o vs sonnet” is still a typed query.

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LIVE

Anthropic

Claude Opus 4.5

Elo 1,568

LiveBench71.2%

SWE-bench76.8%

Speed62 tok/s

Output cost$25/1M

OpenAI

GPT-4o

Elo 1,335

LiveBench54.2%

SWE-bench54.8%

Speed110 tok/s

Output cost$10/1M

Frequently Asked Questions

Which is better overall, Claude Opus 4.5 or GPT-4o?: Claude Opus 4.5 has the higher preference Elo in our latest snapshot (1,568). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Claude Opus 4.5 or GPT-4o?: Claude Opus 4.5 leads SWE-bench at 76.8% vs 54.8%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: GPT-4o output tokens are $10/1M versus $25/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Opus 4.5 or GPT-4o?: GPT-4o has the lower time-to-first-token (180 ms vs 380 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: Claude Opus 4.5 accepts 200k tokens versus 128k.
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 Opus 4.5 and GPT-4o Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Claude Opus 4.5 matchups →|All GPT-4o matchups →

Claude Opus 4.5 vs Claude Opus 4 (previous opus)Claude Opus 4.5 vs Claude Opus 4.6 (next opus)GPT-4o vs GPT-4 Turbo (previous gpt-flagship)GPT-4o vs OpenAI: o1 (next gpt-flagship)GPT-5 vs Claude Opus 4.5 Claude Sonnet 5 vs Claude Opus 4.5

Claude Opus 4.5 vs GPT-4o benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Claude Opus 4.5 (6)vsGPT-4o (4)

Claude Opus 4.5: 6W (60%)Overall: Claude Opus 4.5GPT-4o: 4W (40%)

← Claude Opus 4.5GPT-4o →

Claude Opus 4.5 (5/5)

Intelligence & Reasoning

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

Preference Elo

1,568vs1,335

Coding Elo

1,574vs—

SWE-bench

76.8%vs54.8%

LiveBench

71.2%vs54.2%

GPQA Diamond

84.1%vs73.2%

Claude Opus 4.5: 5WGPT-4o: 0W

GPT-4o (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

62 tok/svs110 tok/s

Time to first token

380 msvs180 ms

Claude Opus 4.5: 0WGPT-4o: 2W

GPT-4o (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$25/1Mvs$10/1M

Input price

$5/1Mvs$2.5/1M

Context window

200kvs128k

Claude Opus 4.5: 1WGPT-4o: 2W

Recommended Workload Routing

Repo / coding agentsClaude Opus 4.5

Higher SWE-bench (76.8%).

High-volume chatGPT-4o

Lower output list price ($10/1M).

Voice / low-latency UIGPT-4o

Lower TTFT (180 ms).

Long-document RAGClaude Opus 4.5

Larger window (200k).

Screenshots / visionClaude Opus 4.5

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

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Claude Opus 4.5	Higher SWE-bench (76.8%).
High-volume chat	GPT-4o	Lower output list price ($10/1M).
Voice / low-latency UI	GPT-4o	Lower TTFT (180 ms).
Long-document RAG	Claude Opus 4.5	Larger window (200k).
Screenshots / vision	Claude Opus 4.5	Both accept images. Defaulting to the higher-Elo side (Claude Opus 4.5).

Frequently Asked Questions

Which is better overall, Claude Opus 4.5 or GPT-4o?

Claude Opus 4.5 has the higher preference Elo in our latest snapshot (1,568). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, Claude Opus 4.5 or GPT-4o?

Claude Opus 4.5 leads SWE-bench at 76.8% vs 54.8%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

GPT-4o output tokens are $10/1M versus $25/1M. Input prices and retry rates still move the real bill.

Which is faster, Claude Opus 4.5 or GPT-4o?

GPT-4o has the lower time-to-first-token (180 ms vs 380 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

Claude Opus 4.5 accepts 200k tokens versus 128k.

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 Opus 4.5 and GPT-4o Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

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Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

Claude Opus 4.5

GPT-4o

GPT-4o

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Claude Opus 4.5 and the Feb 2026 SWE-bench row we still cite

GPT-4o stays as the 2024 compare anchor people still search

Cast Your Matchup Vote

Community Discussions (0)

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Claude Opus 4.5

GPT-4o

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 4.5

GPT-4o

GPT-4o

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Claude Opus 4.5 and the Feb 2026 SWE-bench row we still cite

GPT-4o stays as the 2024 compare anchor people still search

Cast Your Matchup Vote

Community Discussions (0)

Share card

CompareLLM Matrix

Claude Opus 4.5

GPT-4o

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons