The Known Good Updated 4 Sep 2026 Subscribe
Anthropic ·Proprietary ·Released August 2025·Tracked since 25 Jul 2026

Anthropic: Claude Opus 4.1 — quality, speed & price analysis

Compare with another model Provider benchmarks Data sources
Quality
#48 of 65
50based on 5 of 7 evaluations
Known Good Index
Speed
#332 of 338
7.6
Output tokens per second
Price
#430 of 442
$30.00
Blended per 1M tokens
In $15.00 · Out $75.00
Cache hit price
#318 of 324
$1.50
per 1M tokens (−90%)
Context
#311 of 476
200k
tokens (~300 pages)
Summary

Anthropic: Claude Opus 4.1 is in the third quarter of the models we track for quality, but expensive for its standing, and notably slow. It accepts image, text, file input, outputs text, and supports a 200k-token context window.

It scores 50 on the Known Good Index, well below the tracked average of 65, from 5 of the seven component evaluations. Measured against the tracked average, its strongest result is GPQA Diamond (73 against 64) and its weakest is Mock AIME 2024–25 (40 against 54).

Pricing is $15.00 per 1M input tokens (above the $2.07 average) and $75.00 per 1M output (above the $9.51 average). Cached input reads at $1.50 per 1M, a 90% discount on its input price. At 8 tokens per second it sits in the slowest quarter of the models we track.

Generated from tracked data on 4 Sep 2026 · how these comparisons are computed →

Technical specifications
ReasoningYes
Input modalityimage, text, file
Output modalitytext
Context window200,000 tokens
Max output32,000 tokens
WeightsProprietary
Knowledge cutoffJanuary 2025
Tool callingYes
Providers4 hosts · compare →
Highlights — where Anthropic: Claude Opus 4.1 sits
Quality

Known Good Index · Higher is better · Composite of seven published evaluations

97
97
95
93
93
93
92
50
gpt-5.5-pre-release
Gemini 3.1 Pro
Preview
Gemini 3.5 Flash
DeepSeek V4 Pro
0423
GPT-5.5
Qwen3.7 Max
Claude Opus 4.7
Claude Opus 4.1this #48/65
Speed

Output tokens per second · Higher is better · OpenRouter endpoint telemetry

2,998
2,653
594
350
335
328
307
8
Morph V3 Fast
Relace Apply 3
Morph V3 Large
Grok 4.20
Multi-Agent
gpt-oss-safeguard-20b
Mercury 2.5
Preview
Nano Banana 2 Lite
(Gemini 3.1 Flash Lite Image)
Claude Opus 4.1this #332/338 · below scale
Price

Blended USD per 1M tokens · Lower is better · Published pricing via OpenRouter

$0.01
$0.02
$0.03
$0.04
$0.04
$0.04
$0.05
$30.00
Ling-2.6-flash
Mistral Nemo
Ling-3.0-flash
Granite 4.0 Micro
Llama 3 8B Lunaris
Nex-N2-Mini
Solar Pro 4
Claude Opus 4.1this #430/442 · off scale
Jump to section
Models shown

Quality

How Anthropic: Claude Opus 4.1 compares against every tracked model

Known Good IndexCodingMathematicsReasoning
Known Good Index

Composite of GPQA Diamond, Mock AIME 2024–25, MATH Level 5, SWE-bench Verified, LiveBench, Humanity's Last Exam and Terminal-Bench, normalised 0–100. Scores are ingested from Epoch AI; we do not run these evaluations.

⇩
97
97
95
93
93
93
92
92
91
91
90
89
89
50
💡 A lightbulb marks a model its provider publishes as a reasoning model
The Known Good

Quality Breakdown

Anthropic: Claude Opus 4.1 on each evaluation feeding the index, against the tracked average

Evaluation scores

Bar = Anthropic: Claude Opus 4.1 · grey marker = average across tracked models · scores ingested from Epoch AI

GPQA Diamond73 / 64
Mock AIME 2024–2540 / 54
SWE-bench Verified73 / 71
Humanity's Last Exam8 / 17
Terminal-Bench38 / 45
The Known Good

Arena Elo

Human preference rating from blind pairwise votes

Text Arena

Elo from blind pairwise votes, ingested from Arena

1418
Elo · 95% CI ±3
#109
of 406 ranked models
76k
votes counted
1448
style-controlled (#71)

Ingested 4 Sep 2026.

The Known Good

Price & Cost

Published API pricing by token type

BlendedInput vs outputQuality per dollar
Blended Price

USD per 1M tokens at a 3:1 input:output blend. Live from OpenRouter, cross-checked against models.dev. Lower is better. Ranked against the 442 models priced above zero, which is the population the chart draws; excludes 29 published at no cost (free and promotional tiers).

⇩
$0.01
$0.02
$0.03
$0.04
$0.04
$0.04
$0.05
$0.06
$0.06
$0.06
$0.06
$0.06
$0.06
$30.00
The Known Good
We publish blended price rather than cost-per-task. Cost-per-task requires token counts from an evaluation suite we do not run. Blended price is computed from published rates and is fully reproducible — see the pricing methodology.

Context Window

Maximum input tokens accepted

Context windowMax output tokens
Context Window

Maximum input context from provider metadata via models.dev and OpenRouter. Higher is better.

⇩
2.00M
2.00M
2.00M
2.00M
2.00M
1.31M
1.31M
1.31M
1.31M
1.31M
1.31M
1.31M
200k
The Known Good

Speed

Mean output throughput across hosting providers, over successful measurements from the last 48 hours

Output speedBy provider
Output Speed

Mean output tokens per second across all tracked providers, over successful measurements from the last 48 hours. Derived from OpenRouter endpoint telemetry. Higher is better.

⇩
2,998
2,653
594
350
335
328
307
256
167
162
160
156
8
The Known Good

Latency

Time to first token, mean across providers over successful measurements from the last 48 hours

Latency (TTFT)

Seconds to first streamed chunk, mean across tracked providers over successful measurements from the last 48 hours. Derived from OpenRouter endpoint telemetry. Lower is better.

⇩
0.1
0.1
0.2
0.2
0.2
0.2
0.2
0.3
0.3
0.3
0.3
0.3
2.8
The Known Good

Providers

Hosts serving Anthropic: Claude Opus 4.1, with their own price and speed

4 providers
Full provider benchmarks →
ProviderInput $/MOutput $/M BlendedSpeedTTFTContext
Amazon Bedrock · first party $15.00 $75.00 $30.00 11 3.8s 200k
Google · first party $15.00 $75.00 $30.00 3 1.7s 200k
Anthropic · first party $15.00 $75.00 $30.00 — — 200k
Azure · first party $15.00 $75.00 $30.00 — — 200k

Per-host pricing and telemetry from OpenRouter. Speed is output tokens per second; TTFT is time to first token.

The Known Good

History

How price and quality have moved since we began tracking this model

Quality & price over time

Since 25 Jul 2026

Known Good Index 50 · based on 5 of 7 evaluations
Blended price $30.00 per 1M · observed 4 Sep 2026
Output speed 8 tok/s · observed 4 Sep 2026
Time to first token 2.8s

No recorded changes for this model since tracking began.

The Known Good

Comparisons

Head-to-head pages pairing Anthropic: Claude Opus 4.1 with other tracked models

Anthropic: Claude Opus 4.1 vs DeepSeek-R1-Distill-Qwen-32B Anthropic: Claude Opus 4.1 vs Google: Gemma 3 27B Anthropic: Claude Opus 4.1 vs OpenAI: GPT-4.1 Anthropic: Claude Opus 4.1 vs gpt-4.5-preview All 49 comparisons →
Sources for this page
Pricing & providers — OpenRouter Metadata — models.dev Benchmarks — Epoch AI (CC-BY 4.0)Elo — Arena Full attribution →