Claude Haiku 4.5 vs Claude Opus 4.5
Benchmark Performance
Available Benchmarks
| Benchmark | Claude Haiku 4.5 | Claude Opus 4.5 |
|---|---|---|
| LMArena Document Arenadocument-2026-07-30-011508720696 · arena_rating · leader | 1,423.0397% of row best · rating · claude-haiku-4-5-20251001; 95% CI [1416.59570790, 1429.45877492]; votes 30937; rank 30 | 1,461.65100% of row best · rating · claude-opus-4-5-20251101; 95% CI [1451.22442739, 1472.08183979]; votes 7965; rank 19 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,395.2596% of row best · rating · claude-haiku-4-5-20251001; 95% CI [1392.70335168, 1397.78975878]; votes 124979; rank 144 | 1,447.19100% of row best · rating · claude-opus-4-5-20251101-high-32k; 95% CI [1443.28922560, 1451.09589305]; votes 36271; rank 46 |
| Overall ResultCounted from the protocol-matched rows above | 0 benchmark wins | 2 benchmark winsOverall lead |
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 | Claude Opus 4.5 |
|---|---|---|
| Developer | Anthropic | Anthropic |
| Family | Claude 4 5 | Claude 4 |
| Model | Claude Haiku 4.5 | Claude Opus 4.5 |
| Version | Claude Haiku 4.5 | Claude Opus 4.5 |
| Lifecycle | active | active |
| Released | 2025-10-15 | 2025-11-24 |
| Knowledge cutoff | Unknown | 2025-05-01 |
| Input modalities | Unknown | Unknown |
| Output modalities | Unknown | Unknown |
| Context window | 200,000 | 200,000 |
| 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), Deepinfra (Standard) | Anthropic (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, structured_outputs, tools |
12 comparable fields · 6 material differences · Interactive comparison only; indexing gate not met
Claude Haiku 4.5 Capabilities
Claude Opus 4.5 Capabilities
Primary Evidence
Sources and Freshness
Questions
Claude Haiku 4.5 vs Claude Opus 4.5 FAQs
Is Claude Haiku 4.5 or Claude Opus 4.5 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Haiku 4.5 and Claude Opus 4.5, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Haiku 4.5 or Claude Opus 4.5?+
Only Claude Haiku 4.5 has a directly sourced input price: $1.00 per million tokens. Only Claude Haiku 4.5 has a directly sourced output price: $5.00 per million tokens.
Which has a larger context window, Claude Haiku 4.5 or Claude Opus 4.5?+
Neither model has a larger sourced context window in this comparison. Claude Haiku 4.5 is 200,000 and Claude Opus 4.5 is 200,000.
Which performs better in benchmarks, Claude Haiku 4.5 or Claude Opus 4.5?+
There is no overall benchmark winner: An overall winner requires at least two decisive benchmarks from at least two original publishers.
Can Claude Haiku 4.5 or Claude Opus 4.5 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Haiku 4.5 is not marked open weight; Claude Opus 4.5 is not marked open weight.
Can Claude Haiku 4.5 and Claude Opus 4.5 understand images?+
Claude Haiku 4.5 is not documented with image input; Claude Opus 4.5 is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Haiku 4.5 or Claude Opus 4.5?+
Neither has a larger sourced maximum output. Claude Haiku 4.5 is 64,000 and Claude Opus 4.5 is 64,000.
Do Claude Haiku 4.5 and Claude Opus 4.5 support reasoning and tool use?+
Claude Haiku 4.5: reasoning and tool calling. Claude Opus 4.5: reasoning and tool calling. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Haiku 4.5 or Claude Opus 4.5?+
Claude Haiku 4.5 has 2 sourced provider routes; Claude Opus 4.5 has 1, so Claude Haiku 4.5 has broader tracked availability.
Which offers better value, Claude Haiku 4.5 or Claude Opus 4.5?+
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.