Claude Haiku 4.5 vs GPT-4o
Benchmark Performance
Available Benchmarks
| Benchmark | Claude Haiku 4.5 | GPT-4o |
|---|---|---|
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,395.25100% of row best · rating · claude-haiku-4-5-20251001; 95% CI [1392.70335168, 1397.78975878]; votes 124979; rank 144 | 1,282.3392% of row best · rating · gpt-4o-2024-08-06; 95% CI [1278.14385443, 1286.52509361]; votes 45499; rank 250 |
| Overall ResultCounted from the protocol-matched rows above | 1 benchmark winOverall lead | 0 benchmark wins |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Technical Differences
Side-by-Side Facts
| Field | Claude Haiku 4.5 | GPT-4o |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Family | Claude 4 5 | Gpt 4o |
| Model | Claude Haiku 4.5 | GPT-4o |
| Version | Claude Haiku 4.5 | GPT-4o |
| Lifecycle | active | active |
| Released | 2025-10-15 | Unknown |
| Knowledge cutoff | Unknown | 2023-10-01 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 200,000 | 128,000 |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Anthropic (Standard) | OpenAI (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, tools |
13 comparable fields · 7 material differences · Pair passes the primary-source comparison gate
Claude Haiku 4.5 Capabilities
GPT-4o Capabilities
Internal Comparison Graph
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|---|---|---|---|
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 Qwen3.5-35B-A3BQwen | vs | Claude Haiku 4.5Anthropic | cross-developer peersimage, text |
Claude Haiku 4.5Anthropic | vs |  Ministral-3-14B-Reasoning-2512Mistral AI | cross-developer peersimage, text |
Claude Haiku 4.5Anthropic | vs | Ministral-3-3B-Reasoning-2512Mistral AI | cross-developer peersimage, text |
Claude Haiku 4.5Anthropic | vs | Grok 4.6xAI | cross-developer peersimage, text |
| vs | GPT-4oOpenAI | cross-developer peersimage, text | |
GPT-4oOpenAI | vs |  GLM-OCRZ.ai | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Haiku 4.5 vs GPT-4o FAQs
Is Claude Haiku 4.5 or GPT-4o better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Haiku 4.5 and GPT-4o, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Haiku 4.5 or GPT-4o?+
Claude Haiku 4.5 is $1.00 and GPT-4o is $2.50 per million tokens, so Claude Haiku 4.5 is cheaper on this metric. Claude Haiku 4.5 is $5.00 and GPT-4o is $10.00 per million tokens, so Claude Haiku 4.5 is cheaper on this metric.
Which has a larger context window, Claude Haiku 4.5 or GPT-4o?+
Claude Haiku 4.5 has the larger sourced context window. Claude Haiku 4.5 supports 200,000 and GPT-4o supports 128,000.
Which performs better in benchmarks, Claude Haiku 4.5 or GPT-4o?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Claude Haiku 4.5 or GPT-4o be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Haiku 4.5 is not marked open weight; GPT-4o is not marked open weight.
Can Claude Haiku 4.5 and GPT-4o understand images?+
Claude Haiku 4.5 is documented with image input; GPT-4o is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Haiku 4.5 or GPT-4o?+
Claude Haiku 4.5 has the larger sourced maximum output: Claude Haiku 4.5 supports 64,000 and GPT-4o supports 16,384 output tokens.
Do Claude Haiku 4.5 and GPT-4o support reasoning and tool use?+
Claude Haiku 4.5: reasoning, tool calling, and image input. GPT-4o: tool calling and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Haiku 4.5 or GPT-4o?+
Claude Haiku 4.5 has 1 sourced provider route; GPT-4o has 2, so GPT-4o has broader tracked availability.
Which offers better value, Claude Haiku 4.5 or GPT-4o?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.