Quality
Known Good Index and the capability indices, side by side
Each index is min-max normalised across tracked models and scaled 0–100 from published evaluations. We do not run these evaluations.
| Metric | claude-haiku-4-5-20251001 | OpenAI: GPT-5 Nano |
|---|---|---|
| Known Good Index | 67 | 67 |
| Mathematics Index | 82 | 89 |
| Agentic Index | 30 | 21 |
| Openness Index | 5 | 5 |
Quality Breakdown
Every evaluation both models report a published score for
Bar = claude-haiku-4-5-20251001 · marker = OpenAI: GPT-5 Nano · scores ingested from Epoch AI (CC-BY 4.0)
Right-hand figures read claude-haiku-4-5-20251001 / OpenAI: GPT-5 Nano. claude-haiku-4-5-20251001 leads on 3 of 4, OpenAI: GPT-5 Nano on 1.
Arena Elo
Human preference rating from blind pairwise votes
Elo from blind pairwise votes, ingested from Arena. Higher is better.
| Metric | claude-haiku-4-5-20251001 | OpenAI: GPT-5 Nano |
|---|---|---|
| Text Arena | 1,394 | — |
| Text Arena (style controlled) | 1,412 | — |
Price & Cost
Published API pricing by token type
USD per 1M tokens. Blended is a 3:1 input:output mix. Live from OpenRouter, cross-checked against models.dev. Lower is better.
| Metric | claude-haiku-4-5-20251001 | OpenAI: GPT-5 Nano |
|---|---|---|
| Input $/1M | — | $0.05 |
| Output $/1M | — | $0.40 |
| Blended $/1M | — | $0.14 |
| Cache read $/1M | — | $0.005 |
Context Window
Maximum input accepted and maximum output emitted
Provider-declared limits, from metadata via models.dev and OpenRouter. Higher is better.
| Metric | claude-haiku-4-5-20251001 | OpenAI: GPT-5 Nano |
|---|---|---|
| Context window | — | 400k |
| Max output tokens | — | 128k |
Speed & Latency
Median throughput and time to first token across hosting providers
Medians across all tracked providers, derived from OpenRouter endpoint telemetry.
| Metric | claude-haiku-4-5-20251001 | OpenAI: GPT-5 Nano |
|---|---|---|
| Output tokens/s | — | 98 |
| Time to first token | — | 2.3s |
Providers
Which hosts serve each model, and at what price and speed
| Provider | claude-haiku-4-5-20251001 blended | claude-haiku-4-5-20251001 tok/s | OpenAI: GPT-5 Nano blended | OpenAI: GPT-5 Nano tok/s |
|---|---|---|---|---|
| OpenAI · first party | — | — | $0.07 | 186 |
| Azure · first party | — | — | $0.14 | 58 |
Per-host pricing and telemetry from OpenRouter. A dash means that host does not serve that model.