Anthropic: Claude Haiku 4.5 (batch) vs Pareto 26.9
Neither wins outright: Anthropic: Claude Haiku 4.5 (batch) is the pick when cost matters at scale, Pareto 26.9 when you generate long outputs in one go.
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 4.5 (batch)
Pareto 26.9
Difference
Customer-support chatbot
50,000 conversations — each a 6-turn conversation (1,500 in / 400 out tokens)
$87.50
$338
Anthropic: Claude Haiku 4.5 (batch) saves $250
RAG search over documents
20,000 questions — each a question answered from ~8 retrieved passages (6,000 in / 500 out tokens)
$85.00
$375
Anthropic: Claude Haiku 4.5 (batch) saves $290
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)
$90.00
$390
Anthropic: Claude Haiku 4.5 (batch) saves $300
Batch summarisation
10,000 documents — each a 6,000-word report summarised to a page (8,000 in / 600 out tokens)
$55.00
$245
Anthropic: Claude Haiku 4.5 (batch) saves $190
Long-document analysis
500 documents — each a 150-page contract or codebase read in one pass (100,000 in / 2,000 out tokens)
$27.50
$133
Anthropic: Claude Haiku 4.5 (batch) saves $105
Capabilities side by side
Capability
Anthropic: Claude Haiku 4.5 (batch)
Pareto 26.9
What it lets you do
Tool / function calling
✓ Yes
✓ Yes
call your APIs and run agent loops
Structured output (JSON schema)
✓ Yes
✓ Yes
return JSON that validates against your schema
Reasoning / thinking mode
✓ Yes
—
spend extra tokens thinking before answering hard problems
Image input
✓ Yes
✓ 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
—
—
read token confidence for classification and scoring
From each model's published parameters and input/output types. “—” means not advertised, not proven absent.
Price history
Anthropic: Claude Haiku 4.5 (batch): price unchanged since we started tracking it on 2026-08-07.
Pareto 26.9: price unchanged since we started tracking it on 2026-10-14.
Which should you choose?
Choose Anthropic: Claude Haiku 4.5 (batch) if…
cost matters at scale — it is 73% cheaper on a typical 3:1 input/output mix ($87.50 vs $338 a month for 50,000 support chats)
you need reasoning / thinking mode — to spend extra tokens thinking before answering hard problems; Pareto 26.9 does not advertise it
you need file / PDF input — to accept documents without your own parsing step; Pareto 26.9 does not advertise it
you need built-in web search — to answer from live web results; Pareto 26.9 does not advertise it
Choose Pareto 26.9 if…
you generate long outputs in one go — up to 131K tokens (about 98,300 words) per response
you want the newer model — released 2026-10-13, 12 months after the other
Frequently asked questions
Is Anthropic: Claude Haiku 4.5 (batch) better than Pareto 26.9?
Neither wins outright: Anthropic: Claude Haiku 4.5 (batch) is the pick when cost matters at scale, Pareto 26.9 when you generate long outputs in one go. In short: Anthropic: Claude Haiku 4.5 (batch) when cost matters at scale, you need reasoning / thinking mode, you need file / PDF input, you need built-in web search; Pareto 26.9 when you generate long outputs in one go, you want the newer model.
Which is cheaper, Anthropic: Claude Haiku 4.5 (batch) or Pareto 26.9?
Anthropic: Claude Haiku 4.5 (batch) is cheaper: $1.00 vs $3.75 per 1M tokens at a typical 3:1 input/output mix, 73% less. For 50,000 support conversations a month that is $87.50 against $338.
How much do Anthropic: Claude Haiku 4.5 (batch) and Pareto 26.9 cost per million tokens?
Anthropic: Claude Haiku 4.5 (batch) costs $0.50 per 1M input tokens and $2.50 per 1M output tokens; Pareto 26.9 costs $2.50 input and $7.50 output. Output tokens are billed separately, so long answers shift the gap.
Which has the bigger context window, Anthropic: Claude Haiku 4.5 (batch) or Pareto 26.9?
Pareto 26.9: 262K tokens, about 393 pages, against 200K (about 300 pages) for Anthropic: Claude Haiku 4.5 (batch).
Do Anthropic: Claude Haiku 4.5 (batch) and Pareto 26.9 support function calling and JSON output?
Claude Haiku 4.5 is Anthropic’s fastest and most efficient model, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Matching Claude Sonnet 4’s performance...
Pareto is a multimodal composite model built for research, coding, and agentic workflows, while delivering frontier-level performance across a broad range of general-purpose tasks.