Claude Haiku 4.5 vs GPT Realtime

Claude Haiku 4.5 and GPT Realtime are both current production-tier models. Claude Haiku 4.5 is meaningfully cheaper at $1 / $5 per 1M. Claude Haiku 4.5 leads on coding, long-context retrieval, tool use. GPT Realtime leads on multilingual.

Specs side by side

Metric
Anthropic
Claude Haiku 4.5
OpenAI
GPT Realtime
Input price (per 1M)$1$4
Output price (per 1M)$5$16
Context window200k tokens128k tokens
Speed tierfastultra
Open weightsNoNo
EU regionYesYes
Free tierNoNo
Prompt cachingYesNo
Vision inputYesNo
Extended thinkingNoNo

When to choose each

Anthropic

Choose Claude Haiku 4.5 if…

  • Cost is a priority ($1 / $5 per 1M vs $4 / $16 per 1M)
  • HIPAA eligibility is required
  • You need image input / vision
  • Coding is central to your workload
  • Long-context retrieval is central to your workload
OpenAI

Choose GPT Realtime if…

  • You need realtime speech-to-speech
  • Multilingual is central to your workload

Benchmark delta

Claude Haiku 4.5 leads on

  • Coding
  • Long-context retrieval
  • Tool use

GPT Realtime leads on

  • Multilingual

FAQ — Claude Haiku 4.5 vs GPT Realtime

Claude Haiku 4.5 vs GPT Realtime — which is better?

Claude Haiku 4.5 and GPT Realtime are both current production-tier models. Claude Haiku 4.5 is meaningfully cheaper at $1 / $5 per 1M. Claude Haiku 4.5 leads on coding, long-context retrieval, tool use. GPT Realtime leads on multilingual. The right pick depends on your use case — see "When to choose each" above for a data-driven decision.

How does Claude Haiku 4.5 pricing compare to GPT Realtime?

Claude Haiku 4.5 costs $1 / $5 per 1M vs GPT Realtime at $4 / $16 per 1M. Claude Haiku 4.5 is cheaper on output tokens by roughly 220%. Both support prompt caching, which reduces effective cost by 80-90% on repeat system prompts.

Does Claude Haiku 4.5 or GPT Realtime have the bigger context window?

Claude Haiku 4.5 has a 200k-token context window — 2× the 128k context of GPT Realtime. Enough for long reports and multi-document analysis.

Is there a free tier for Claude Haiku 4.5 or GPT Realtime?

Claude Haiku 4.5: no — No free API tier; new accounts get starter credits. GPT Realtime: no — Paid-only.

Which is better for coding — Claude Haiku 4.5 or GPT Realtime?

Claude Haiku 4.5 leads on coding benchmarks (Claude Haiku 4.5: 82/100, GPT Realtime: 78/100). For production coding agents also weigh tool-use performance — Claude Haiku 4.5 scores 88, GPT Realtime scores 84.