Context Window

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Claude Haiku 4 5 vs Gpt 5 2 Chat Latest

This page is context-first: how much text each model can take in one request. Full specs adds capabilities and limits; the pricing matrix below is only about $/million tokens from hosts that list both models.

Anthropic

Model

Claude Haiku 4 5

Image inputTool calling

Context window

200K

200,000 tokens · ~150K words

Model page
Openai

Model

Gpt 5 2 Chat Latest

Image inputTool calling

Context window

128K

128,000 tokens · ~96K words

Model page

Context window · side by side

Bar length is relative to the larger of the two windows (100% = max of this pair). This is not pricing.

Claude Haiku 4 5200K
Gpt 5 2 Chat Latest128K

Claude Haiku 4 5 has about 1.6× the context window of the other in this pair.

Token calculator →Memory savings →

Claude Haiku 4 5 has 56% more context capacity (200K vs 128K tokens). Claude Haiku 4 5 is 42% cheaper on input.

Quick verdicts

Short takeaways — validate with your own workloads.

  • Long document processing

    Use Claude Haiku 4 5. Its 200K context fits entire documents without chunking (vs 128K).

  • RAG / high-volume retrieval

    Use Claude Haiku 4 5. Input tokens are 42% cheaper — critical when sending large retrieved contexts.

  • Long output (reports, code files)

    Use Claude Haiku 4 5. Its 64K max output lets you generate complete artifacts in one request.

Full specs

Context, output, capabilities, and dates. Green highlights the favorable value where we compute a winner.

SpecClaude Haiku 4 5Gpt 5 2 Chat Latest
Context window200,000 tokens (200K)128,000 tokens (128K)
Max output tokens64,000 tokens (64K)16,384 tokens (16K)
Speed tierFastBalanced
VisionYesYes
Function callingYesYes
Extended thinkingYesYes
Prompt cachingYesYes
Batch APIYesNo
Release dateN/AN/A

Pricing matrix

Dollar rates only: hosts that list both models, per 1M tokens. For how much text fits, use the context section above — not this table.

ProviderClaude Haiku 4 5 inClaude Haiku 4 5 outGpt 5 2 Chat Latest inGpt 5 2 Chat Latest out
Anthropic$1.00/M$5.00/M——
Azure$1.00/M$5.00/M——
Google Vertex$1.00/M$5.00/M——
Openai——$1.75/M$14.00/M
Openrouter$1.00/M$5.00/M——

Frequently asked questions

Claude Haiku 4 5 has a larger context window: 200K tokens vs 128K. For long documents, large codebases, or extended agent sessions, the larger context window reduces the need to chunk inputs or summarize history.

Powered by Mem0

Use a smaller model.
Get better results.

Mem0 gives your AI long-term memory so you stop re-sending context on every call. That means you can use a smaller, faster, cheaper model — and still get better answers.

Calculate your savingsLearn about Mem0

Example: a multi-turn chat session

Without Mem0~128K tokens sent
Full history
Repeated info
Old context
With Mem0~20K tokens sent
Key memories
Current turn

80% less to send — works with any model