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Anthropic: Claude Haiku 5.5 (batch) vs DeepSeek: DeepSeek V4 Flash 0731 (batch)

Neither wins outright: Anthropic: Claude Haiku 5.5 (batch) is the pick when cost matters at scale, DeepSeek: DeepSeek V4 Flash 0731 (batch) when you need log-probabilities.

Key numbers

SpecAnthropic: Claude Haiku 5.5 (batch)DeepSeek: DeepSeek V4 Flash 0731 (batch)
ProviderAnthropicDeepSeek
Input price (per 1M tokens)$0.05$0.11
Output price (per 1M tokens)$0.25$0.33
Blended price (3:1 input/output)$0.10$0.17
Cheaper than … of all models we track80%73%
Context window1M tokens (~1,500 pages)1.0M tokens (~1,573 pages)
Larger context than … of all models69%81%
Max output per response128K tokens (~96,000 words)944K tokens (~707,800 words)
Input typestext, image, filetext
Output typestexttext
Free variantNoNo
Listed since2026-10-072026-07-31
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What it costs for real workloads

Monthly cost at list price for five common workloads. Token counts per unit are stated so you can scale them to your own traffic. A workload that does not fit a model's context window is marked rather than priced.

Workload (per month)Anthropic: Claude Haiku 5.5 (batch)DeepSeek: DeepSeek V4 Flash 0731 (batch)Difference
Customer-support chatbot
50,000 conversations — each a 6-turn conversation (1,500 in / 400 out tokens)
$8.75$14.85Anthropic: Claude Haiku 5.5 (batch) saves $6.10
RAG search over documents
20,000 questions — each a question answered from ~8 retrieved passages (6,000 in / 500 out tokens)
$8.50$16.50Anthropic: Claude Haiku 5.5 (batch) saves $8.00
Coding / tool-using agent
2,000 tasks — each a multi-step task with tool calls and file context (60,000 in / 6,000 out tokens)
$9.00$17.16Anthropic: Claude Haiku 5.5 (batch) saves $8.16
Batch summarisation
10,000 documents — each a 6,000-word report summarised to a page (8,000 in / 600 out tokens)
$5.50$10.78Anthropic: Claude Haiku 5.5 (batch) saves $5.28
Long-document analysis
500 documents — each a 150-page contract or codebase read in one pass (100,000 in / 2,000 out tokens)
$2.75$5.83Anthropic: Claude Haiku 5.5 (batch) saves $3.08

Capabilities side by side

CapabilityAnthropic: Claude Haiku 5.5 (batch)DeepSeek: DeepSeek V4 Flash 0731 (batch)What it lets you do
Tool / function calling✓ Yes✓ Yescall your APIs and run agent loops
Structured output (JSON schema)✓ Yes✓ Yesreturn JSON that validates against your schema
Reasoning / thinking mode✓ Yes✓ Yesspend extra tokens thinking before answering hard problems
Image input✓ Yes—read screenshots, charts and scanned pages
Audio input——take speech or audio directly
File / PDF input✓ Yes—accept documents without your own parsing step
Image output——generate images, not just text
Built-in web search✓ Yes—answer from live web results
Seed (reproducible sampling)——repeat a generation for tests and evals
Log-probabilities—✓ Yesread token confidence for classification and scoring

From each model's published parameters and input/output types. “—” means not advertised, not proven absent.

Price history

DateModelInput / 1MOutput / 1M
2026-09-09DeepSeek: DeepSeek V4 Flash 0731 (batch)$0.11$0.33

Which should you choose?

Choose Anthropic: Claude Haiku 5.5 (batch) if…

  • cost matters at scale — it is 39% cheaper on a typical 3:1 input/output mix ($8.75 vs $14.85 a month for 50,000 support chats)
  • you need image input — to read screenshots, charts and scanned pages; DeepSeek: DeepSeek V4 Flash 0731 (batch) does not advertise it
  • you need file / PDF input — to accept documents without your own parsing step; DeepSeek: DeepSeek V4 Flash 0731 (batch) does not advertise it
  • you need built-in web search — to answer from live web results; DeepSeek: DeepSeek V4 Flash 0731 (batch) does not advertise it

Choose DeepSeek: DeepSeek V4 Flash 0731 (batch) if…

  • you need log-probabilities — to read token confidence for classification and scoring; Anthropic: Claude Haiku 5.5 (batch) does not advertise it
  • you generate long outputs in one go — up to 944K tokens (about 707,800 words) per response

Frequently asked questions

Is Anthropic: Claude Haiku 5.5 (batch) better than DeepSeek: DeepSeek V4 Flash 0731 (batch)?

Neither wins outright: Anthropic: Claude Haiku 5.5 (batch) is the pick when cost matters at scale, DeepSeek: DeepSeek V4 Flash 0731 (batch) when you need log-probabilities. In short: Anthropic: Claude Haiku 5.5 (batch) when cost matters at scale, you need image input, you need file / PDF input, you need built-in web search; DeepSeek: DeepSeek V4 Flash 0731 (batch) when you need log-probabilities, you generate long outputs in one go.

Which is cheaper, Anthropic: Claude Haiku 5.5 (batch) or DeepSeek: DeepSeek V4 Flash 0731 (batch)?

Anthropic: Claude Haiku 5.5 (batch) is cheaper: $0.10 vs $0.17 per 1M tokens at a typical 3:1 input/output mix, 39% less. For 50,000 support conversations a month that is $8.75 against $14.85.

How much do Anthropic: Claude Haiku 5.5 (batch) and DeepSeek: DeepSeek V4 Flash 0731 (batch) cost per million tokens?

Anthropic: Claude Haiku 5.5 (batch) costs $0.05 per 1M input tokens and $0.25 per 1M output tokens; DeepSeek: DeepSeek V4 Flash 0731 (batch) costs $0.11 input and $0.33 output. Output tokens are billed separately, so long answers shift the gap.

Which has the bigger context window, Anthropic: Claude Haiku 5.5 (batch) or DeepSeek: DeepSeek V4 Flash 0731 (batch)?

DeepSeek: DeepSeek V4 Flash 0731 (batch): 1.0M tokens, about 1,573 pages, against 1M (about 1,500 pages) for Anthropic: Claude Haiku 5.5 (batch).

Do Anthropic: Claude Haiku 5.5 (batch) and DeepSeek: DeepSeek V4 Flash 0731 (batch) support function calling and JSON output?

Tool calling — Anthropic: Claude Haiku 5.5 (batch): yes, DeepSeek: DeepSeek V4 Flash 0731 (batch): yes. JSON-schema structured output — Anthropic: Claude Haiku 5.5 (batch): yes, DeepSeek: DeepSeek V4 Flash 0731 (batch): yes.

Can Anthropic: Claude Haiku 5.5 (batch) or DeepSeek: DeepSeek V4 Flash 0731 (batch) read images?

Only Anthropic: Claude Haiku 5.5 (batch) accepts image input; DeepSeek: DeepSeek V4 Flash 0731 (batch) is text-only for input.

Is Anthropic: Claude Haiku 5.5 (batch) or DeepSeek: DeepSeek V4 Flash 0731 (batch) free to use?

No free variant is listed for either; both are pay-per-token.

What is the maximum output length of Anthropic: Claude Haiku 5.5 (batch) and DeepSeek: DeepSeek V4 Flash 0731 (batch)?

Anthropic: Claude Haiku 5.5 (batch) can write up to 128K tokens (about 96,000 words) per response; DeepSeek: DeepSeek V4 Flash 0731 (batch) up to 944K (about 707,800 words).

When were Anthropic: Claude Haiku 5.5 (batch) and DeepSeek: DeepSeek V4 Flash 0731 (batch) released?

Anthropic: Claude Haiku 5.5 (batch) was listed on 2026-10-07; DeepSeek: DeepSeek V4 Flash 0731 (batch) on 2026-07-31.

Has the price of Anthropic: Claude Haiku 5.5 (batch) or DeepSeek: DeepSeek V4 Flash 0731 (batch) changed?

Anthropic: Claude Haiku 5.5 (batch): price unchanged since we started tracking it on 2026-10-08. DeepSeek: DeepSeek V4 Flash 0731 (batch): input price cut 21% ($0.14 → $0.11/1M), output price raised 15% ($0.28 → $0.33/1M) on 2026-09-09.

About the two models

Compare Anthropic: Claude Haiku 5.5 (batch) with other models

vs AI21: Jamba Large 1.7vs AionLabs: Aion 3.5vs AionLabs: Aion 3.5 Minivs AionLabs: Aion-1.0

Compare DeepSeek: DeepSeek V4 Flash 0731 (batch) with other models

vs AI21: Jamba Large 1.7vs AionLabs: Aion 3.5vs AionLabs: Aion 3.5 Minivs AionLabs: Aion-1.0
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