Who ranks #1 on the SWE-bench Multilingual leaderboard?
As of August 31, 2026, Claude Mythos Preview by Anthropic ranks #1 on SWE-bench Multilingual at 87.3%. API pricing is $10.00/M input and $50.00/M output.
As of August 31, 2026, Claude Mythos Preview is #1 for SWE-bench Multilingual at 87.3%. Ranked by the SWE-bench Multilingual score 42 models in this index have a published SWE-bench Multilingual score. SWE-bench Multilingual leaderboard with live API prices. SWE-bench Multilingual — a multilingual software engineering benchmark derived from SWE-bench tasks across multiple languages and locales.
42 models. Left is cheaper. Up is a higher score. The line is the best score you can buy at each price — a dot under it is a worse deal than something on the line.
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As of August 31, 2026, Claude Mythos Preview by Anthropic is #1 for SWE-bench Multilingual at 87.3%. Ranked by the SWE-bench Multilingual score This board also tracks SWE-bench Multilingual. Next on the same board: Claude Opus 4.8 and Qwen3.8 Flash. This swe-bench multilingual leaderboard ranks models by SWE-bench Multilingual. Scores come from public evals. Prices are the live API rates in the table above.
Sources: OpenAI API pricing (https://developers.openai.com/api/docs/pricing); Anthropic Claude API pricing (https://platform.claude.com/docs/en/about-claude/pricing); Gemini API pricing (https://ai.google.dev/gemini-api/docs/pricing)
| Rank | Model | SWE-bench Multilingual | Input /M | Output /M |
|---|---|---|---|---|
| 1 | Claude Mythos Preview | 87.3% | $10.00 | $50.00 |
| 2 | Claude Opus 4.8 | 84.4% | $5.00 | $25.00 |
| 3 | Qwen3.8 Flash | 81% | $0.15 | $0.47 |
| 4 | Qwen3.8-Flash-Next | 81% | $0.15 | $0.47 |
| 5 | Laguna S 2.1 | 78.5% | $0.10 | $0.20 |
| 6 | Claude Sonnet 5 | 78.3% | $2.00 | $10.00 |
| 7 | Qwen3.7 Max | 78.3% | $1.25 | $3.75 |
| 8 | Claude Opus 4.6 | 77.8% | $5.00 | $25.00 |
Rank one eval at a time. All LLM benchmarks.
As of August 31, 2026, Claude Mythos Preview by Anthropic ranks #1 on SWE-bench Multilingual at 87.3%. API pricing is $10.00/M input and $50.00/M output.
The current SWE-bench Multilingual ranking as of August 31, 2026 is 1. Claude Mythos Preview at 87.3%; 2. Claude Opus 4.8 at 84.4%; 3. Qwen3.8 Flash at 81%.
Nemotron 3.5 Lightning (30B A3B) is the cheapest scored model on this swe-bench multilingual leaderboard at $0.05/M input and $0.20/M output ($0.25 blended). Claude Mythos Preview still leads SWE-bench Multilingual at 87.3%.
Not automatically. Claude Mythos Preview leads SWE-bench Multilingual, but a cheaper scored model can be the better production choice if the quality gap is small. Use the table to weigh SWE-bench Multilingual against input/output price, context window, and related evals.
Scores and API prices on this page are refreshed from published evals and provider rates. The snapshot is labeled August 31, 2026. Treat it as a current index, not a one-off blog post.
SWE-bench Multilingual — a multilingual software engineering benchmark derived from SWE-bench tasks across multiple languages and locales. This page ranks models that have published a SWE-bench Multilingual score, with live API token prices on the same row.
This page is the SWE-bench Multilingual leaderboard. Models are sorted by SWE-bench Multilingual, with input and output token prices on the same row so you can weigh score against cost. Official boards often omit price; that comparison is the point of this index.
Official eval pages own the methodology. This page keeps the published SWE-bench Multilingual score next to live API $/M so you can pick a production SKU, not only a trophy number.