The Known Good Updated 25 Jul 2026
Anthropic: Claude Opus 4.6 vs Microsoft: Phi 4 ·Anthropic vs Microsoft

Anthropic: Claude Opus 4.6 vs Microsoft: Phi 4 — head-to-head comparison

Anthropic: Claude Opus 4.6 profile Microsoft: Phi 4 profile All comparisons
Anthropic: Claude Opus 4.6 — Anthropic
Quality
#11 of 61
88based on 5 of 6 evaluations
Known Good Index
Speed
#220 of 316
36.6
Output tokens per second
Price
#315 of 340
$10.00
Blended per 1M tokens
In $5.00 · Out $25.00
Cache hit price
#186 of 206
$0.50
per 1M tokens (−90%)
Context
#85 of 345
1.00M
tokens (~1,500 pages)
Microsoft: Phi 4 — Microsoft
Quality
#50 of 61
33based on 3 of 6 evaluations
Known Good Index
Speed
#145 of 316
55.4
Output tokens per second
Price
#40 of 340
$0.09
Blended per 1M tokens
In $0.07 · Out $0.14
Cache hit price
unranked
—
per 1M tokens
Context
#334 of 345
16k
tokens (~25 pages)
Summary

On the Known Good Index, Anthropic: Claude Opus 4.6 scores 88 and Microsoft: Phi 4 scores 33 — a 55-point lead for Anthropic: Claude Opus 4.6. They share 2 published evaluations, with Anthropic: Claude Opus 4.6 ahead on 2 and Microsoft: Phi 4 ahead on 0.

Blended pricing is $10.00 per 1M tokens for Anthropic: Claude Opus 4.6 and $0.09 for Microsoft: Phi 4 — Microsoft: Phi 4 is about 114.3× cheaper.

Throughput is 37 tokens per second for Anthropic: Claude Opus 4.6 and 55 for Microsoft: Phi 4, with time to first token at 2.1s and 0.2s. Anthropic: Claude Opus 4.6 accepts 1.00M tokens of context against 16k.

Anthropic: Claude Opus 4.6 is proprietary; Microsoft: Phi 4 is open weights under Open weights (unrestricted). 5 tracked hosts serve one or both.

Generated from tracked data on 26 Jul 2026 · how these comparisons are computed →

At a glance
MetricAnthropic: Claude Opus 4.6Microsoft: Phi 4
Known Good Index 88 based on 5 of 6 evaluations 33 based on 3 of 6 evaluations
Blended $/1M $10.00 $0.09
Output tok/s 37 55
Context window 1.00M 16k
Providers 4 1
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Quality

Known Good Index and the capability indices, side by side

IndicesComponents
Index scores

Each index is min-max normalised across tracked models and scaled 0–100 from published evaluations. We do not run these evaluations.

MetricAnthropic: Claude Opus 4.6Microsoft: Phi 4
Known Good Index 88 33
Coding Index 89 —
Mathematics Index 93 39
Science Index 95 53
Reasoning Index 84 47
Agentic Index 89 —
Openness Index 5 60
The Known Good

Quality Breakdown

Every evaluation both models report a published score for

Evaluations both models report

Bar = Anthropic: Claude Opus 4.6 · marker = Microsoft: Phi 4 · scores ingested from Epoch AI (CC-BY 4.0)

GPQA Diamond91 / 56
MATH / AIME93 / 14

Right-hand figures read Anthropic: Claude Opus 4.6 / Microsoft: Phi 4. Anthropic: Claude Opus 4.6 leads on 2 of 2, Microsoft: Phi 4 on 0.

The Known Good

Arena Elo

Human preference rating from blind pairwise votes

Arena ratings

Elo from blind pairwise votes, ingested from Arena. Higher is better.

MetricAnthropic: Claude Opus 4.6Microsoft: Phi 4
Text Arena 1,497 1,217
Text Arena (style controlled) 1,498 1,256
The Known Good

Price & Cost

Published API pricing by token type

Per token typeCache discount
Published pricing

USD per 1M tokens. Blended is a 3:1 input:output mix. Live from OpenRouter, cross-checked against models.dev. Lower is better.

MetricAnthropic: Claude Opus 4.6Microsoft: Phi 4
Input $/1M $5.00 $0.07
Output $/1M $25.00 $0.14
Blended $/1M $10.00 $0.09
Cache read $/1M $0.500 —
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 accepted and maximum output emitted

Context and output limits

Provider-declared limits, from metadata via models.dev and OpenRouter. Higher is better.

MetricAnthropic: Claude Opus 4.6Microsoft: Phi 4
Context window 1.00M 16k
Max output tokens 128k 16k
The Known Good

Speed & Latency

Median throughput and time to first token across hosting providers

Output speedTime to first token
Throughput and latency

Medians across all tracked providers, derived from OpenRouter endpoint telemetry.

MetricAnthropic: Claude Opus 4.6Microsoft: Phi 4
Output tokens/s 37 55
Time to first token 2.1s 0.2s
The Known Good

Providers

Which hosts serve each model, and at what price and speed

5 hosts
Full provider benchmarks →
Provider Anthropic: Claude Opus 4.6 blendedAnthropic: Claude Opus 4.6 tok/s Microsoft: Phi 4 blendedMicrosoft: Phi 4 tok/s
Amazon Bedrock · first party $10.00 41 — —
Google · first party $10.00 41 — —
Anthropic · first party $10.00 35 — —
Azure · first party $10.00 25 — —
DeepInfra — — $0.09 38

Per-host pricing and telemetry from OpenRouter. A dash means that host does not serve that model.

The Known Good
Sources for this page
Pricing & providers — OpenRouter Metadata — models.dev Benchmarks — Epoch AI (CC-BY 4.0)Elo — Arena Full attribution →