Cheapest frontier model API
Frontier = statistically tied with the best-scored model on the Epoch Capabilities Index (Epoch AI, CC BY 4.0): the top of the model's confidence interval reaches the bottom of the leader's (Claude Opus 5.5 leads at 169 today, so interval top ≥ 165; verified 2026-10-23). source. · 11 models
| # | Model | Input /1M | Output /1M | Blended /1M | Released | Verified |
|---|---|---|---|---|---|---|
| 1 | GPT-6 Sol (OpenAI) · OpenAI | $2 | $10 | $12 | 2026-09-22 | 25d ago |
| 2 | Claude Sonnet 5.5 (Anthropic) · Anthropic | $2 | $10 | $12 | 2026-09-28 | 6d ago |
| 3 | GPT-6.1 Sol (OpenAI) · OpenAI | $2 | $10 | $12 | 2026-09-29 | 24d ago |
| 4 | Gemini 4 Argon (Google) · Google | $2 | $10 | $12 | 2026-09-30 | 6d ago |
| 5 | Claude Opus 5.5 (Anthropic) · Anthropic | $4 | $20 | $24 | 2026-09-22 | 29d ago |
| 6 | GPT-5.6 Sol (OpenAI) · OpenAI | $4 | $20 | $24 | 2026-07-09 | today |
| 7 | Muse Wonder (Meta) · Meta | $4 | $20 | $24 | 2026-10-12 | today |
| 8 | Claude Opus 5 (Anthropic) · Anthropic | $5 | $25 | $30 | 2026-07-24 | today |
| 9 | Claude Fable 5 (Anthropic) · Anthropic | $10 | $50 | $60 | 2026-06-09 | today |
| 10 | Claude Fable 5.1 (Anthropic) · Anthropic | $10 | $50 | $60 | 2026-09-01 | 48d ago ⚠ |
| 11 | GPT-6 Astra (OpenAI) · OpenAI | $10 | $50 | $60 | 2026-09-03 | 6d ago |
Blended = input + output price per 1M tokens. One cheapest offer shown per model, models released within the last 12 months. "Verified" = when each price was last checked against its source. Click a column header to sort.