Claude Haiku 4.5 vs GPT Realtime 2
Claude Haiku 4.5 and GPT Realtime 2 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 2 leads on multilingual.
Specs side by side
| Metric | Anthropic Claude Haiku 4.5 | OpenAI GPT Realtime 2 |
|---|---|---|
| Input price (per 1M) | $1 | $4 |
| Output price (per 1M) | $5 | $24 |
| Context window | 200k tokens | 128k tokens |
| Speed tier | fast | ultra |
| Open weights | No | No |
| EU region | Yes | Yes |
| Free tier | No | No |
| Prompt caching | Yes | No |
| Vision input | Yes | No |
| Extended thinking | No | No |
When to choose each
Choose Claude Haiku 4.5 if…
- Cost is a priority ($1 / $5 per 1M vs $4 / $24 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
Choose GPT Realtime 2 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 2 leads on
- Multilingual
FAQ — Claude Haiku 4.5 vs GPT Realtime 2
Claude Haiku 4.5 vs GPT Realtime 2 — which is better?
Claude Haiku 4.5 and GPT Realtime 2 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 2 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 2?
Claude Haiku 4.5 costs $1 / $5 per 1M vs GPT Realtime 2 at $4 / $24 per 1M. Claude Haiku 4.5 is cheaper on output tokens by roughly 380%. Both support prompt caching, which reduces effective cost by 80-90% on repeat system prompts.
Does Claude Haiku 4.5 or GPT Realtime 2 have the bigger context window?
Claude Haiku 4.5 has a 200k-token context window — 2× the 128k context of GPT Realtime 2. Enough for long reports and multi-document analysis.
Is there a free tier for Claude Haiku 4.5 or GPT Realtime 2?
Claude Haiku 4.5: no — No free API tier; new accounts get starter credits. GPT Realtime 2: no — Paid-only.
Which is better for coding — Claude Haiku 4.5 or GPT Realtime 2?
Claude Haiku 4.5 leads on coding benchmarks (Claude Haiku 4.5: 82/100, GPT Realtime 2: 78/100). For production coding agents also weigh tool-use performance — Claude Haiku 4.5 scores 88, GPT Realtime 2 scores 84.