Private AI

Nano GPT logo
NanoGPT
Nano GPT logo
NanoGPT
Nano GPT logo
NanoGPT
Search
 
 
 
 
All conversations

Create

Chat
Studio

Explore

Models
Pricing
AI Apps
Blog

Library

Gallery
Workspace
Usage & billing
API
Suggestions and bugs
Use cases

|

Terms

|

Privacy

|

Refunds
Usage & billing
Teams
Referrals
Presets
Settings
FAQPress & mediaBrand assetsBenchmarksNano RPCEarn crypto
  1. Models
  2. Text
  3. Anthropic

Claude Haiku 4.5 Thinking

Claude Haiku 4.5 with extended thinking enabled for deeper planning, more deliberate coding, and multi-step reasoning without moving up to Sonnet pricing.

  • Reasoning
  • Vision
  • Native PDF input
  • Tool Calling
  • Structured Output

Added Oct 15, 2025

Pricing

Auto routing · per 1M tokens
Input
$1.00
Output
$5.00
Cache read
$0.10
Compare provider prices

Specifications

Context window
200K
Max output
64K
Avg output (7d)
499 tokens
Longer than 40% of models

Benchmarks

Sourced from Vectara.

Hallucination Rate

9.8%

Hallucination Rate: 9.8
Better than 47% of models compared

Factual Consistency

90.2%

Factual Consistency: 90.2
Better than 47% of models compared

Answer Rate

99.5%

Answer Rate: 99.5
Better than 49% of models compared

Avg Summary Length

Average generated summary length

115.1

Last updated 2026-10-22 · Matched as anthropic/claude-haiku-4-5-20251001

Vectara Leaderboard

Providers

Auto routing is available for this model. Explicit provider selection is not available.

Cache write /M
Auto
Auto
Recommended
$1.00$5.00$0.10$1.25N/AN/A
Batch API
ProviderInputOutputCached inputCache write
Anthropic
Anthropicclaude-haiku-4-5-20251001-thinking
$0.50/M$2.50/M$0.05/M$0.625/M

Reliability

Related text models

Compare Claude Haiku 4.5 Thinking with similar models from the same provider or model family.

Claude Haiku 4.5

anthropic/claude-haiku-4.5

Claude Haiku 4.5 matches Sonnet 4's coding quality while running about twice as fast at roughly one-third the price, making it ideal for low-latency chat assistants, support bots, and pair programming. Pair it with Sonnet 4.5 to plan complex work and fan out execution across parallel Haiku workers.

Claude Haiku 5.5

anthropic/claude-haiku-5.5

Claude Haiku 5.5 is Anthropic's fastest and most capable small model, designed for high-volume, cost-sensitive tasks such as summaries, classification, coding assistance, and live customer support. It delivers major gains over Haiku 4.5 while costing around 75% less to run.

Claude Haiku Latest

anthropic/claude-haiku-latest

Compatibility alias that routes to the newest version of Claude Haiku. Currently routes to Claude Haiku 5.5 with adaptive thinking.

Claude Fable 5.2

anthropic/claude-fable-5.2

Anthropic's Claude Fable 5.2 supports demanding reasoning, coding, and long-running agentic work, with text, image, and PDF inputs, tool calling, and structured outputs. It has a 1M-token context window and up to 128K output tokens. Adaptive thinking is always on, with five effort levels. Prompts and outputs are retained for 30 days; Zero Data Retention is not available.

Claude Sonnet 5.5

anthropic/claude-sonnet-5.5

Claude Sonnet 5.5 handles everyday coding, tool-based workflows, visual analysis, and polished writing with a 1M-token context window. This version skips up-front thinking and can reason between tool calls for faster responses; use Thinking for deeper planning and complex problems.

Claude Sonnet 5.5 Thinking

anthropic/claude-sonnet-5.5:thinking

Claude Sonnet 5.5 with adaptive thinking for complex coding, multi-step tool use, visual analysis, and detailed planning. Supports a 1M-token context window and five reasoning effort levels, with stronger thinking available when a task needs it.