// head_to_head
Claude Haiku 5.5 vs Kimi K3
Published LiveBench scores across all seven categories, live list pricing, context windows, and the measured cost of a point of capability — for both models, side by side.
Claude Haiku 5.5 wins outright — it scores higher and costs less.
Claude Haiku 5.5 leads by 11.1 points overall while listing 15× cheaper per blended million tokens. There is no trade-off to reason about here; the only reason to pick the other is a constraint this table does not show, like an existing contract, a region, or a provider you are already on. Claude Haiku 5.5 also leads on measured cost per point of capability, at $0.1429 per point.
anthropic
Claude Haiku 5.5
- Blended / 1M
- $0.200
- Context
- 1M
- Released
- Oct 7, 2026
- Overall score
- 74.5
moonshotai
Kimi K3
- Blended / 1M
- $3.05
- Context
- 1.0M
- Released
- Jul 16, 2026
- Overall score
- 63.4
Specs and pricing
| Metric | Claude Haiku 5.5 | Kimi K3 |
|---|---|---|
| LiveBench overall Mean of the seven LiveBench category scores, 0–100. Higher is better. | 74.5win | 63.4 |
| Cost per point Measured benchmark spend divided by overall score — dollars per point of capability. | $0.1429win | $1.24 |
| Blended price / 1M 3:1 input:output mix, the usual shape of production traffic. | $0.200win | $3.05 |
| Input price / 1M | $0.100win | $0.730 |
| Output price / 1M | $0.500win | $10.00 |
| Cached input / 1M Price of an input token served from the prompt cache, where the provider publishes one. | $0.010win | $0.550 |
| Context window | 1M | 1.0M |
| Max output tokens | 128K | 944Kwin |
Benchmarks by category
An overall score averages away the thing you probably care about. These are the seven LiveBench categories scored separately — Claude Haiku 5.5 on top, Kimi K3 below, both out of 100.
What each one costs to run
Per-token prices are hard to feel. These are monthly list costs for both models across five workload shapes, using each provider's published cached-input rate where there is one.
| Workload | Claude Haiku 5.5 | Kimi K3 |
|---|---|---|
| Support chatbot 1.2K in / 400 out × 200K requests | $57.52/mo | $962.24/mo |
| RAG assistant 8K in / 600 out × 100K requests | $74.00/mo | $1,112/mo |
| Coding agent 40K in / 4K out × 20K requests | $69.60/mo | $1,283/mo |
| Document extraction 20K in / 1.5K out × 50K requests | $133.00/mo | $1,471/mo |
| Bulk classification 500 in / 20 out × 5M requests | $255.00/mo | $2,735/mo |
Which should you pick?
You are running this at volume
Claude Haiku 5.5
Lowest measured cost per point of capability at $0.1429 per point — the gap compounds with every request.
Quality matters more than the bill
Claude Haiku 5.5
Highest overall LiveBench score of the two at 74.5.
The workload is coding or agentic work
Claude Haiku 5.5
Leads on coding — 84.5 against 59.3.
Claude Haiku 5.5 vs Kimi K3 FAQ
Which is better, Claude Haiku 5.5 or Kimi K3?
Claude Haiku 5.5 wins outright — it scores higher and costs less. Claude Haiku 5.5 leads by 11.1 points overall while listing 15× cheaper per blended million tokens. There is no trade-off to reason about here; the only reason to pick the other is a constraint this table does not show, like an existing contract, a region, or a provider you are already on. Claude Haiku 5.5 also leads on measured cost per point of capability, at $0.1429 per point.
Is Claude Haiku 5.5 cheaper than Kimi K3?
Claude Haiku 5.5 is cheaper. On a 3:1 input:output blend, Claude Haiku 5.5 lists at $0.200 per million tokens and Kimi K3 at $3.05 — Claude Haiku 5.5 is 15× cheaper. Input and output are priced separately — Claude Haiku 5.5 charges $0.100 in and $0.500 out, Kimi K3 charges $0.730 and $10.00 — so the model that looks cheaper flips depending on how output-heavy your workload is.
Claude Haiku 5.5 vs Kimi K3: which scores higher on benchmarks?
Claude Haiku 5.5 scores 74.5 and Kimi K3 scores 63.4 overall on LiveBench, the mean of its seven categories. That is a 11.1-point lead for Claude Haiku 5.5. Category scores differ from the overall figure — a model can lead on reasoning and trail on coding, which the per-category table above breaks out.
Which gives better value for money, Claude Haiku 5.5 or Kimi K3?
Claude Haiku 5.5. Cost per point divides the measured dollars LiveBench spent running the benchmark by the score it earned, so it captures something token pricing misses: a reasoning model can emit many times more tokens than its per-token rate suggests. Claude Haiku 5.5 works out at $0.1429 per point and Kimi K3 at $1.24.
Does Claude Haiku 5.5 or Kimi K3 have a bigger context window?
They are effectively the same — 1M for Claude Haiku 5.5 and 1.0M for Kimi K3.
Do Claude Haiku 5.5 and Kimi K3 support prompt caching?
Both publish a cached-input rate: $0.010 per million for Claude Haiku 5.5 and $0.550 for Kimi K3, against full input rates of $0.100 and $0.730. On a workload with a long stable prefix — a system prompt, a tool schema, a retrieved corpus — that changes the economics more than the headline price does.
Related comparisons
How these numbers are produced
- Price — provider list price from OpenRouter, refreshed every 15 minutes. “Blended” is a 3:1 input:output mix.
- Scores — LiveBench release 2026-09-02, using their own category map. Each model shows its strongest published run. A blank means “not evaluated”, never “bad”.
- Cost per point — the measured dollars LiveBench spent on the run, divided by the score it earned.
- “Win” — awarded only past a threshold: one full point on a benchmark score, 10% on a price, 25% on a context window. Anything tighter reports as a tie, because effort settings alone move a LiveBench score by more than that.
Published benchmarks rank models on someone else's tasks. Before committing, see LLM & agent evaluation for building an eval on your own.