Claude Fable 5$22.000/MClaude Opus 4.8$11.000/MClaude Opus 4.7$11.000/MClaude Opus 4.6$11.000/MClaude Opus 4.5$33.000/MClaude Sonnet 3.7$6.600/MClaude Opus 3$33.000/MClaude 2.1$12.800/MClaude 2$12.800/MGPT-5.5$12.500/MGPT-5.2$5.425/MGPT-5.2-Codex$5.425/MGPT-5$3.875/MGPT-4.5$97.500/MGPT-4 Turbo Preview$16.000/MGPT-4$39.000/MGPT-4-32k$78.000/Mo3$19.000/Mo3-mini$2.090/Mo4-mini$2.090/Mo1$28.500/Mo1-mini$5.700/Mo1-preview$28.500/MGemini 3.5 Pro$5.000/MGemini 3.1 Pro$5.000/MGemini 3 Pro$5.000/MGemini 2.5 Pro$3.875/MGemini 1.5 Pro$2.375/MGemini 1.0 Ultra$12.000/MGemini 1.0 Pro$0.800/MClaude Fable 5$22.000/MClaude Opus 4.8$11.000/MClaude Opus 4.7$11.000/MClaude Opus 4.6$11.000/MClaude Opus 4.5$33.000/MClaude Sonnet 3.7$6.600/MClaude Opus 3$33.000/MClaude 2.1$12.800/MClaude 2$12.800/MGPT-5.5$12.500/MGPT-5.2$5.425/MGPT-5.2-Codex$5.425/MGPT-5$3.875/MGPT-4.5$97.500/MGPT-4 Turbo Preview$16.000/MGPT-4$39.000/MGPT-4-32k$78.000/Mo3$19.000/Mo3-mini$2.090/Mo4-mini$2.090/Mo1$28.500/Mo1-mini$5.700/Mo1-preview$28.500/MGemini 3.5 Pro$5.000/MGemini 3.1 Pro$5.000/MGemini 3 Pro$5.000/MGemini 2.5 Pro$3.875/MGemini 1.5 Pro$2.375/MGemini 1.0 Ultra$12.000/MGemini 1.0 Pro$0.800/M
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01.AI
01.AIFrontier

Yi-34B

Open Base

Open-weights Yi-34B base. Designed for downstream fine-tuning rather than direct chat use.

Yi-34B is a frontier AI model from 01.AI. It costs $0.800 per million input tokens and $0.800 per million output tokens (blended $0.800/M), with a 4K-token context window.

Released Nov 2023Modalities textOfficial model page ↗Compare with another model →Estimate monthly cost →
INPUT
$0.800/M
per million input tokens
OUTPUT
$0.800/M
per million output tokens
BLENDED 70/30
$0.800/M
default reference rate · how it's calculated →
CONTEXT
4K
4,000 tokens
What it's good at
  • Open-weights base
  • Strong bilingual base
  • 200K-context variants available
Typical use cases
  • Fine-tune base
  • Continued pretraining experiments
Benchmarks
vs. best public score
Scores inherited from Yi-34B — this is a hosted variant of the same open-weights model, so the underlying benchmark scores are identical.
MMLU73%
Multitask academic knowledge across 57 subjects.
HumanEval56%
Python function synthesis from docstrings.
Hand-curated from each provider's published reports and public leaderboards. Methodology varies across sources — treat as directional rather than authoritative.
More from 01.AI
See all 9 →
Yi-Lightning
Fast · 16K ctx
in $0.140/Mout $0.140/M
Yi-Large
Frontier · 32K ctx
in $3.000/Mout $3.000/M
Yi-Large-Turbo
Balanced · 16K ctx
in $0.380/Mout $0.380/M
Yi-34B-Chat
Open Large · 4K ctx
in $0.800/Mout $0.800/M
Yi-9B
Compact · 4K ctx
in $0.300/Mout $0.300/M
Yi-6B
Nano · 4K ctx
in $0.150/Mout $0.150/M
Frequently asked questions

How much does Yi-34B cost?

Yi-34B costs $0.800 per million input tokens and $0.800 per million output tokens, for a blended reference rate of $0.800 per million tokens.

What is Yi-34B's context window?

Yi-34B supports up to 4K tokens of context (4,000 tokens).

What is Yi-34B best for?

Yi-34B is well suited to Open-weights base, Strong bilingual base and 200K-context variants available.

Who makes Yi-34B?

Yi-34B is developed and served by 01.AI. It was released in Nov 2023.