COMPARISON / AI models

Claude Sonnet 5.5 vs. DeepSeek V4.1 Flash

Q: Where do these prices come from?

From each provider's official pages, linked on every product page and reviewed on Oct 17, 2026. Codifly is not paid for any product's position.

Compare published indexes, API pricing and context limits. Pick two to four options to explore how they differ.

Snapshot: 2026-10-17 · Public sources · Not a real-time feed

Editorial editionReviewed on 2026-10-17Not a real-time feed

Option 1

Claude Sonnet 5.5

Anthropic · Proprietary API

Key figure · LLM Stats58.7points

Best in 0 of 3

View details

Option 2

DeepSeek V4.1 Flash

DeepSeek · Reasoning API

Key figure · LLM StatsNo datapoints

Best in 3 of 3

View details

Option 3

Same category, comparable metrics

What changes between your options

CSV

Differences only Only metrics everyone has data forHighlighted = best value on that dimension, not an overall winner

Comparison of Claude Sonnet 5.5, DeepSeek V4.1 Flash
Metric	Claude Sonnet 5.5	DeepSeek V4.1 Flash
LLM Statspoints · higher is better	58.7LLM Stats ↗	No dataNot included
Reasoningpoints · higher is better	57.2LLM Stats ↗	No dataNot included
Codingpoints · higher is better	48.3LLM Stats ↗	No dataNot included
Input priceUSD / M tokens · lower is betterDeepSeek V4.1 Flash 6.7× cheaper	6.7×$2.00Vendor ↗	$0.30 (Best value)Vendor ↗
Output priceUSD / M tokens · lower is betterDeepSeek V4.1 Flash 8.3× cheaper	8.3×$10.00Vendor ↗	$1.20 (Best value)Vendor ↗
Contexttokens · higher is better	1.00MVendor ↗	1.00MVendor ↗
Max outputtokens · higher is betterDeepSeek V4.1 Flash 3× more	−67%128KVendor ↗	384K (Best value)Vendor ↗

Standard API, USD per million tokens, no caching, short context. Indexes are an LLM Stats snapshot; they are not percentages or Codifly tests. A curated catalog, not an exhaustive one.

Compare each dimension

Metric

LLM Stats

Composite index published by LLM Stats. It is not a percentage of correct answers.

Claude Sonnet 5.558.7

1 with no data · left out of the chart

Price versus index

A relationship between two dimensions, not an automatic recommendation.

Input price and LLM Stats values
Product	Input price (USD / M tokens)	LLM Stats (points)
Claude Sonnet 5.5	$2.00	58.7

Select a product in the legend to isolate it. Points may overlap.

1 product lacks both values · not plotted

Cost at scale

What would your usage cost?

Three usage levels computed only from catalog rates. Assumptions in plain sight; not a quote.

Prototype

5M input + 1M output tokens / month

Cheapest option$2.70/ monthDeepSeek V4.1 Flash7.4× cheaper than the priciest

DeepSeek V4.1 Flash$2.70 (Best value)
Claude Sonnet 5.5$20.00

Product

100M input + 20M output / month

Cheapest option$54.00/ monthDeepSeek V4.1 Flash7.4× cheaper than the priciest

DeepSeek V4.1 Flash$54.00 (Best value)
Claude Sonnet 5.5$400.00

Scale

1,000M input + 200M output / month

Cheapest option$540.00/ monthDeepSeek V4.1 Flash7.4× cheaper than the priciest

DeepSeek V4.1 Flash$540.00 (Best value)
Claude Sonnet 5.5$4,000.00

Standard input and output rates; no caching, batch, tools or long-context surcharges.

Your own volume

Input × rate + output × rate. Change the volume to see the difference.

Input tokens (millions)Output tokens (millions)

Aggregate volume of short-context requests. No caching, tools, taxes, batch or long-context surcharges. Not a quote.

DeepSeek V4.1 Flash$5.40 (Best value)
Claude Sonnet 5.5$40.00

Estimated USD

Specs and operations

Feature	Claude Sonnet 5.5	DeepSeek V4.1 Flash
Inputs	Text, image	No data
Outputs	Text	No data
Context limit	Published window: 1,000,000 tokens	No data
Distribution	Proprietary API	No data
API identifier	No data	deepseek-flash
Version checked	No data	DeepSeek-V4.1-Flash-1017
Input	No data	Text
Reference rate	No data	Peak, cache miss; off-peak 50%
Published context	No data	1M; published max output: 384K

Sources, scope and fine print

What to validate before you make a decision.

Methodology

Claude Sonnet 5.5

Base rate for the direct API. Caching, batch, tools and other providers have their own terms. The index doesn't determine the outcome for your use case.

Checked on 2026-10-17 · Editorial update

DeepSeek V4.1 Flash

Shows the PEAK uncached rate. Peak hours: Monday to Friday 01–04 and 06–10 UTC. Off-peak costs half. The 1M/384K figures keep the published notation; reasoning tokens use up budget.

DeepSeek · current rates and limits

Checked on 2026-10-17 · Editorial update

Take the comparison to your use case.

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Frequently asked questions

How much does GPT-6 Astra cost?

Input price: $10.00 USD / M tokens · Output price: $50.00 USD / M tokens. Official prices reviewed on Oct 17, 2026; confirm conditions and discounts in the linked source.

How much does Claude Opus 5.5 cost?

Input price: $4.00 USD / M tokens · Output price: $20.00 USD / M tokens. Official prices reviewed on Oct 17, 2026; confirm conditions and discounts in the linked source.

How much does Gemini 4 Argon cost?

Input price: $2.00 USD / M tokens · Output price: $10.00 USD / M tokens. Official prices reviewed on Oct 17, 2026; confirm conditions and discounts in the linked source.

How much does GPT-6 Astra cost in Colombian pesos?

Precio entrada: $10.00 USD / M tokens ≈ COP 31,747 / M tokens · MXN 185 / M tokens · BRL 50.89 / M tokens · Precio salida: $50.00 USD / M tokens ≈ COP 158,734 / M tokens · MXN 923 / M tokens · BRL 254 / M tokens. Reference conversion at the TRM of 3,174.67 COP per dollar (Oct 17, 2026); it excludes taxes and bank fees.

How much does Claude Opus 5.5 cost in Colombian pesos?

Precio entrada: $4.00 USD / M tokens ≈ COP 12,699 / M tokens · MXN 73.86 / M tokens · BRL 20.35 / M tokens · Precio salida: $20.00 USD / M tokens ≈ COP 63,493 / M tokens · MXN 369 / M tokens · BRL 102 / M tokens. Reference conversion at the TRM of 3,174.67 COP per dollar (Oct 17, 2026); it excludes taxes and bank fees.

How much does Gemini 4 Argon cost in Colombian pesos?

Precio entrada: $2.00 USD / M tokens ≈ COP 6,349 / M tokens · MXN 36.93 / M tokens · BRL 10.18 / M tokens · Precio salida: $10.00 USD / M tokens ≈ COP 31,747 / M tokens · MXN 185 / M tokens · BRL 50.89 / M tokens. Reference conversion at the TRM of 3,174.67 COP per dollar (Oct 17, 2026); it excludes taxes and bank fees.

Which is cheapest by input price?

By Gemini 4 Argon ($2.00 USD / M tokens) < Claude Opus 5.5 ($4.00 USD / M tokens) < GPT-6 Astra ($10.00 USD / M tokens). Also compare limits and conditions: a lower price does not always mean an equivalent plan.

Where do these prices come from?

From each provider's official pages, linked on every product page and reviewed on Oct 17, 2026. Codifly is not paid for any product's position.

Metric

Claude Sonnet 5.5

DeepSeek V4.1 Flash

LLM Statspoints · higher is better

58.7LLM Stats ↗

No dataNot included

Reasoningpoints · higher is better

57.2LLM Stats ↗

No dataNot included

Codingpoints · higher is better

48.3LLM Stats ↗

No dataNot included

Input priceUSD / M tokens · lower is betterDeepSeek V4.1 Flash 6.7× cheaper

6.7×$2.00Vendor ↗

$0.30Vendor ↗

Output priceUSD / M tokens · lower is betterDeepSeek V4.1 Flash 8.3× cheaper

8.3×$10.00Vendor ↗

$1.20Vendor ↗

Contexttokens · higher is better

1.00MVendor ↗

Max outputtokens · higher is betterDeepSeek V4.1 Flash 3× more

−67%128KVendor ↗

384KVendor ↗

Input price and LLM Stats values
Product	Input price (USD / M tokens)	LLM Stats (points)
Claude Sonnet 5.5	$2.00	58.7

Input price and LLM Stats values

Product

Input price (USD / M tokens)

LLM Stats (points)

Claude Sonnet 5.5

$2.00

58.7

Feature

Claude Sonnet 5.5

DeepSeek V4.1 Flash

Inputs

Text, image

No data

Outputs

Text

No data

Context limit

Published window: 1,000,000 tokens

No data

Distribution

Proprietary API

No data

API identifier

No data

deepseek-flash

Version checked

No data

DeepSeek-V4.1-Flash-1017

Input

No data

Text

Reference rate

No data

Peak, cache miss; off-peak 50%

Published context

No data

1M; published max output: 384K

Claude Sonnet 5.5

DeepSeek V4.1 Flash

What changes between your options

Compare each dimension

LLM Stats

Price versus index

What would your usage cost?

Your own volume

Specs and operations

Sources, scope and fine print

Claude Sonnet 5.5

DeepSeek V4.1 Flash

Take the comparison to your use case.

Frequently asked questions

Guides to help you decide

Claude Sonnet 5.5

DeepSeek V4.1 Flash

What changes between your options

Compare each dimension

LLM Stats

Price versus index

What would your usage cost?

Your own volume

Specs and operations

Sources, scope and fine print

Claude Sonnet 5.5

DeepSeek V4.1 Flash

Take the comparison to your use case.