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  3. Anthropic: Claude Opus 4.1 vs GPT-5

Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

Anthropic: Claude Opus 4.1 vs GPT-5 benchmark

In this head-to-head showdown, GPT-5 is more budget-friendly at $10/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Executive Comparison Verdict

Bottom Line: Choose Anthropic: Claude Opus 4.1 if your priority is peak reasoning, complex code generation, and top preference Elo. Choose GPT-5 if you are optimizing for low latency, high throughput, and cost-efficient API deployment.
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Executive Verdict Summary

GPT-5 holds empirical advantage (3 of 3 metrics)

Coding / SWESWE-bench
GPT-5Top code solve rate
ReasoningGPQA / Live
GPT-5Top logical accuracy
Best Value$/1M Tok
GPT-5Lowest API billing cost
Speed / TokTok/Sec
GPT-5Fastest stream rate

Verified Advantage Breakdown

3 benchmarks evaluated across capability, speed, and cost

Anthropic: Claude Opus 4.1 (0)GPT-5 (3)
Anthropic: Claude Opus 4.1
0 of 3 Wins
Competitive baseline across remaining benchmarks
GPT-5
3 of 3 Wins
✓Input price✓Output price✓Context window
Anthropic
Anthropic: Claude Opus 4.1

Auto-discovered from OpenRouter (anthropic/claude-opus-4.1). Preview until a second source matches.

In: $15 · Out: $75/1M
OpenAI
Leads 3 of 3
GPT-5

OpenAI flagship reasoning model for 2025–26. Strong general preference Elo and multimodal coverage.

Elo 1,558In: $1.25 · Out: $10/1M

GPT-5 Thinking Depth & Cost Scaler

Model B

Simulate accuracy gains vs added response time & token cost

Mode: Medium (Standard)

Reasoning models “think before answering” by generating internal reasoning tokens. Higher effort improves math, coding, and logic accuracy, but increases response delay and token costs.

Delay
290 ms
Standard
CoT Tokens
~1,500
Internal reasoning
Cost / 1k
$18.63
5.1× base bill
Accuracy Boost
+4.5%
STEM & Logic
Top Rival Showdowns for Anthropic: Claude Opus 4.1
All Matchups
Compare vs:vs GPT-5 minivs Gemini 3 Provs Grok 4.6vs DeepSeek V4 Provs Qwen 3 Max
Preference Leader

No shared data

Single model data

Throughput Leader

No shared data

No latency data

Value per Dollar LeaderGPT-5 Wins

GPT-5

$10 / 1M output

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Multi-Dimensional Capability Radar

Leaders Matchup Capability Radar

Comparing top standard models across 6 key capability dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect
0–100 %ile

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

Anthropic: Claude Opus 4.1 (0)vsGPT-5 (10)
Anthropic: Claude Opus 4.1: 0W (0%)Overall: GPT-5GPT-5: 10W (100%)
← Anthropic: Claude Opus 4.1GPT-5 →
🏆GPT-5 Leads(5/5)

Intelligence & Reasoning

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

Benchmark
Anthropic: Claude Opus 4.1vsGPT-5
Preference Elo
—vs1,558
Coding Elo
—vs1,540
SWE-bench
—vs68.4%
LiveBench
—vs69.8%
GPQA Diamond
—vs85.2%
Anthropic: Claude Opus 4.1: 0WGPT-5: 5W
🏆GPT-5 Leads(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
Anthropic: Claude Opus 4.1vsGPT-5
Output speed
—vs78 tok/s
Time to first token
—vs290 ms
Anthropic: Claude Opus 4.1: 0WGPT-5: 2W
🏆GPT-5 Leads(3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
Anthropic: Claude Opus 4.1vsGPT-5
Output price
$75/1Mvs$10/1M+$65/1M
Input price
$15/1Mvs$1.25/1M+$13.75/1M
Context window
200kvs400k+200k
Anthropic: Claude Opus 4.1: 0WGPT-5: 3W

Side-by-Side Benchmark Matrix

Anthropic: Claude Opus 4.1GPT-5
Preference Elo
Anthropic: Claude Opus 4.1—
GPT-51,558
Coding Elo
Anthropic: Claude Opus 4.1—
GPT-51,540
LiveBench
Anthropic: Claude Opus 4.1—
GPT-569.8%
SWE-bench
Anthropic: Claude Opus 4.1—
GPT-568.4%
GPQA Diamond
Anthropic: Claude Opus 4.1—
GPT-585.2%
Time to first token
Anthropic: Claude Opus 4.1—
GPT-5290 ms
Output speed
Anthropic: Claude Opus 4.1—
GPT-578 tok/s
Input priceGPT-5 +$13.75/1M
Anthropic: Claude Opus 4.1$15/1M
GPT-5$1.25/1M
Output priceGPT-5 +$65/1M
Anthropic: Claude Opus 4.1$75/1M
GPT-5$10/1M
Context windowGPT-5 +200k
Anthropic: Claude Opus 4.1200k
GPT-5400k
BenchmarkAnthropic: Claude Opus 4.1GPT-5Advantage Delta
Preference Elo—
1,558
lmarena · Aug 17, 2026
—
Coding Elo—
1,540
lmarena · Aug 17, 2026
—
LiveBench—
69.8%
livebench · Aug 17, 2026
—
SWE-bench—
68.4%
swebench · Aug 17, 2026
—
GPQA Diamond—
85.2%
seed-bootstrap · Aug 1, 2026
—
Time to first token—
290 ms
seed-bootstrap · Aug 1, 2026
—
Output speed—
78 tok/s
seed-bootstrap · Aug 1, 2026
—
Input price
$15/1M
openrouter · Aug 17, 2026
$1.25/1M
openrouter · Aug 17, 2026
+$13.75/1M
Output price
$75/1M
openrouter · Aug 17, 2026
$10/1M
openrouter · Aug 17, 2026
+$65/1M
Context window
200k
openrouter · Aug 17, 2026
400k
openrouter · Aug 17, 2026
+200k

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save 88% with GPT-5
Monthly Volume50M tokens/mo
Quick Presets:
Token Ratio (In vs Out)70% In / 30% Out
RAG / Search (10% out)Coding / Chat (50% out)
Anthropic: Claude Opus 4.1$1,650.00 / mo
In: $525Out: $1,125
GPT-5$193.75 / mo
In: $43.75Out: $150
Estimated Cost Delta

GPT-5 is estimated to save $1,456.25/month ($17,475/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

  • 1
    GPT-5:Pick GPT-5 when you are optimizing output cost.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatGPT-5

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

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGGPT-5

Larger window (400k).

Screenshots / visionGPT-5

GPT-5 is the side marked multimodal in the catalog.

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsinsufficient dataNeed SWE-bench on both sides.
High-volume chatGPT-5Lower output list price ($10/1M).
Voice / low-latency UIinsufficient dataNeed TTFT on both sides.
Long-document RAGGPT-5Larger window (400k).
Screenshots / visionGPT-5GPT-5 is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news
launchAug 8, 2025

GPT-5 (2025) remains the legacy OpenAI flagship baseline

Still a common compare target. 5.6 Sol replaced it as the buy; GPT-5 stays for old URLs.

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK
VS
Anthropic

Anthropic: Claude Opus 4.1

Elo n/a
SWE-bench—
Speed (tok/s)200k
Input / 1M Tokens$15/1M
Output / 1M Tokens$75/1M
OpenAI

GPT-5

Elo 1,558
SWE-bench68.4%
Speed (tok/s)78 tok/s
Input / 1M Tokens$1.25/1M
Output / 1M Tokens$10/1M

Frequently Asked Questions

Which is better overall, Anthropic: Claude Opus 4.1 or GPT-5?
We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, Anthropic: Claude Opus 4.1 or GPT-5?
SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?
GPT-5 output tokens are $10/1M versus $75/1M. Input prices and retry rates still move the real bill.
Which is faster, Anthropic: Claude Opus 4.1 or GPT-5?
We do not have TTFT for both models.
Which has the larger context window?
GPT-5 accepts 400k 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. Anthropic: Claude Opus 4.1 and GPT-5 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Related news

  • launch · Aug 8, 2025

    GPT-5 (2025) remains the legacy OpenAI flagship baseline

Similar Head-to-Head Comparisons

All Anthropic: Claude Opus 4.1 matchups →|All GPT-5 matchups →
GPT-5 vs GPT-4.5 Orion (previous gpt-flagship)GPT-5 vs GPT-5.6 Sol (next gpt-flagship)Claude Opus 4.5 vs GPT-5Claude Opus 4.6 vs GPT-5Claude Sonnet 4.5 vs GPT-5Claude Opus 5 vs GPT-5